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From: "Shwetha Bhandari (shwethab)" <shwethab@cisco.com>
To: "Joel M. Halpern" <jmh@joelhalpern.com>, "Frank Brockners (fbrockne)" <fbrockne@cisco.com>, "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
CC: "sfc@ietf.org" <sfc@ietf.org>
Thread-Topic: [sfc] draft-ietf-sfc-proof-of-transit-04 ready for WGLC? (was RE: PoT review/comments)
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Date: Wed, 1 Apr 2020 17:14:40 +0000
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Subject: Re: [sfc] draft-ietf-sfc-proof-of-transit-04 ready for WGLC? (was RE: PoT review/comments)
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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Wed, 1 Apr 2020 11:59:58 -0700
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To: "Joel M. Halpern" <jmh@joelhalpern.com>
Cc: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>, "sfc@ietf.org" <sfc@ietf.org>
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Subject: Re: [sfc] draft-ietf-sfc-proof-of-transit-04 ready for WGLC? (was RE: PoT review/comments)
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Dear All,
I agree with Joel that the reference in draft-ietf-sfc-proof-of-transit to
draft-ietf-ippm-ioam-data should be normative. I also support the proposal
to add in draft-ietf-sfc-proof-of-transit a normative reference to
draft-ietf-sfc-ioam-nsh. SFC WG is working on defining SFC that is based on
NSH (SFC NSH), and while SFC might be realized using other techniques,
draft-ietf-sfc-ioam-nsh is, and likely will remain, the only document that
is describing iOAM encapsulation in SFC NSH. Thus, I believe, for SFC WG,
implementation of PoT based on iOAM requires implementation of iOAM
encapsulation in SFC NSH, as defined in draft-ietf-sfc-ioam-nsh. Hence, the
reference must be normative.

Regards,
Greg

On Tue, Mar 24, 2020 at 2:25 PM Joel M. Halpern <jmh@joelhalpern.com> wrote=
:

> I think we all agree that draft-ietf-sfc-proof-of-transit requires the
> normative reference to draft-ietf-ippm-ioam-data.
>
> Regarding a reference from draft-ietf-sfc-proof-of-transit to
> draft-ietf-sfc-ioam-nsh, I think we agree that it is needed.  The
> question then is normative or informative.  If we use the usual IETF
> rule that there has to be a defined normative way to interoperably
> implement a protocol spec (with other options allowed), my inclination
> is that the reference should be normative.
>
> Regarding the informative reference in the other direction from
> draft-ietf-sfc-ioam-nsh to draft-ietf-sfc-proof-of-transit, while I
> personally like the idea, that is up to you / the working group.
>
> Yours,
> Joel
>
> On 3/24/2020 5:20 PM, Carlos Pignataro (cpignata) wrote:
> > Hi, Joel,
> >
> > The way in which the doc hierarchy and relationship is structure seems
> > to support and potentially even require:
> >
> > From draft-ietf-sfc-proof-of-transit:
> > * A normative reference to [I-D.ietf-ippm-ioam-data], since PoT gives
> > over IOAM explicitly, and that exists.
> > * Optionally, an Informative reference to draft-ietf-sfc-ioam-nsh, sinc=
e
> > that=E2=80=99s really one out of many ways to carry IOAM over NSH, but =
separated
> > by document indirection. This does not exist but can be added.
> >
> >  From draft-ietf-sfc-ioam-nsh:
> > * Optionally, an Informative reference to
> > draft-ietf-sfc-proof-of-transit, since that=E2=80=99s one out of many
> > applications. This does not exist but can be added.
> >
> > Thoughts?
> >
> > Best,
> >
> > Carlos.
> >
> >> 2020/03/24 =E5=8D=88=E5=BE=8C5:10=E3=80=81Joel M. Halpern <jmh@joelhal=
pern.com
> >> <mailto:jmh@joelhalpern.com>>=E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:
> >>
> >> Carlos, it sounds like there should probably be a normative reference
> >> from draft-ietf-sfc-proof of transit to draft-ietf-sfc-ioam-nsh?
> >> Possibly in the same sentence that refers to draft-ietf-ippm-ioam-data=
?
> >>
> >> Yours,
> >> Joel
> >>
> >> On 3/24/2020 4:54 PM, Carlos Pignataro (cpignata) wrote:
> >>> Greg,
> >>> The very first sentence of the PoT document reads:
> >>>    Several technologies such as Traffic Engineering (TE), Service
> >>>    Function Chaining (SFC), and policy based routing are used to stee=
r
> >>>    traffic through a specific, user-defined path.  This document
> defines
> >>> Explaining how this document is applicable to various
> >>> traffic-steering technologies.
> >>> Section 3 then explains:
> >>>    The POT information is encapsulated in packets as an IOAM Proof Of
> >>>    Transit Option.  The details and format of the encapsulation and t=
he
> >>>    POT Option format are specified in [I-D.ietf-ippm-ioam-data].
> >>> Which shows how to carry PoT in IOAM, with an appropriate pointer.
> >>> Lastly, draft-ietf-sfc-ioam-nsh-03 defines IOAM over an NSH
> >>> encapsulation.
> >>> This arrangements maximizes specification modularity and
> >>> portability/reusability.
> >>> Best,
> >>> Carlos.
> >>>> 2020/03/24 =E5=8D=88=E5=BE=8C4:48=E3=80=81Greg Mirsky <gregimirsky@g=
mail.com
> >>>> <mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com>>=E3=81=
=AE=E3=83=A1=E3=83=BC=E3=83=AB:
> >>>>
> >>>> Hi Joel,
> >>>> thank you for the most expedient response. As I understand it, iOAM
> >>>> Data draft describes the format of the informational element that
> >>>> carries POT-related information but it does not define how the
> >>>> element to be carried in case of NSH encapsulation. And that is what
> >>>> I was asking, apologies for not being clear in my first note.
> >>>>
> >>>> Regards,
> >>>> Greg
> >>>>
> >>>> On Tue, Mar 24, 2020 at 1:42 PM Joel M.. Halpern
> >>>> <jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>
> >>>> <mailto:jmh@joelhalpern.com>> wrote:
> >>>>
> >>>>    Regarding the information carriage, the PoT document points to th=
e
> >>>>    IOAM
> >>>>    document.
> >>>> https://tools.ietf.org/html/draft-ietf-ippm-ioam-data-08#section-4.5
> >>>>    gives the format (and ways to have other formats if needed.)
> >>>>
> >>>>    Yours,
> >>>>    Joel
> >>>>
> >>>>    On 3/24/2020 4:26 PM, Greg Mirsky wrote:
> >>>>    > Hi Frank,
> >>>>    > thank you for reminding us about this important work, indeed we
> >>>>    should
> >>>>    > complete it. I've reviewed the draft and have several questions=
.
> >>>>    Please
> >>>>    > kindly consider:
> >>>>    >
> >>>>    >   * I couldn't find information where, relative to NSH, RND and
> >>>>    CML are
> >>>>    >     transported
> >>>>    >   * for YANG data models using "reference" is strongly
> >>>>    encouraged as it
> >>>>    >     provides a pointer to the specification. Since the POT data
> >>>>    model is
> >>>>    >     in the same document as the POT specification, listing the
> >>>>    >     appropriate section should suffice
> >>>>    >
> >>>>    > Regards,
> >>>>    > Greg
> >>>>    >
> >>>>    > On Thu, Mar 19, 2020 at 6:45 AM Frank Brockners (fbrockne)
> >>>>    > <fbrockne=3D40cisco.com@dmarc.ietf.org
> >>>> <mailto:fbrockne=3D40cisco.com@dmarc.ietf.org>
> >>>>    <mailto:40cisco.com@dmarc.ietf.org>
> >>>>    > <mailto:40cisco.com@dmarc.ietf.org
> >>>>    <mailto:40cisco.com@dmarc.ietf.org>>> wrote:
> >>>>    >
> >>>>    >     Dear SFC WG,____
> >>>>    >
> >>>>    >     __ __
> >>>>    >
> >>>>    >     It=E2=80=99s been a while since we posted
> >>>>    draft-ietf-sfc-proof-of-transit-04
> >>>>    >     which addressed all known comments =E2=80=93 see below.
> >>>>    >     I=E2=80=99ve not seen any more recent comments or questions=
 come up
> >>>>    =E2=80=93 and
> >>>>    >     we=E2=80=99ve been through quite a few discussions and revi=
ews of
> this
> >>>>    >     document already.____
> >>>>    >
> >>>>    >     __ __
> >>>>    >
> >>>>    >     Thus the question: Are we ready for WG LC?____
> >>>>    >
> >>>>    >     __ __
> >>>>    >
> >>>>    >     Thanks, Frank____
> >>>>    >
> >>>>    >     __ __
> >>>>    >
> >>>>    >     *From:* Frank Brockners (fbrockne)
> >>>>    >     *Sent:* Donnerstag, 21. November 2019 08:21
> >>>>    >     *To:* Alejandro Aguado FI <a.aguadom@fi.upm.es
> >>>> <mailto:a.aguadom@fi.upm.es>
> >>>>    <mailto:a.aguadom@fi.upm.es>
> >>>>    >     <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>>;
> >>>>    Diego R. Lopez
> >>>>    >     <diego.r.lopez@telefonica.com
> >>>> <mailto:diego.r.lopez@telefonica.com>
> >>>>    <mailto:diego.r.lopez@telefonica.com>
> >>>>    >     <mailto:diego.r.lopez@telefonica.com
> >>>>    <mailto:diego.r.lopez@telefonica.com>>>; Carlos Pignataro
> (cpignata)
> >>>>    >     <cpignata@cisco.com <mailto:cpignata@cisco.com>
> >>>> <mailto:cpignata@cisco.com>
> >>>>    <mailto:cpignata@cisco.com <mailto:cpignata@cisco..com>>>;
> >>>>    ALEJANDRO AGUADO
> >>>>    >     MARTIN <alejandro.aguadomartin.ext@telefonica.com
> >>>> <mailto:alejandro.aguadomartin.ext@telefonica.com>
> >>>>    <mailto:alejandro.aguadomartin..ext@telefonica.com>
> >>>>    >     <mailto:alejandro.aguadomartin.ext@telefonica.com
> >>>>    <mailto:alejandro.aguadomartin..ext@telefonica.com>>>; Shwetha
> >>>>    >     Bhandari (shwethab) <shwethab@cisco.com
> >>>> <mailto:shwethab@cisco.com>
> >>>>    <mailto:shwethab@cisco.com>
> >>>>    >     <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com>>>;
> >>>>    Tal Mizrahi <tal.mizrahi.phd@gmail.com
> >>>> <mailto:tal.mizrahi.phd@gmail.com>
> >>>>    <mailto:tal.mizrahi.phd@gmail.com>
> >>>>    >     <mailto:tal.mizrahi.phd@gmail.com
> >>>>    <mailto:tal.mizrahi.phd@gmail.com>>>
> >>>>    >     *Cc:* sfc@ietf.org <mailto:sfc@ietf.org> <mailto:
> sfc@ietf.org>
> >>>>    <mailto:sfc@ietf.org <mailto:sfc@ietf.org>>
> >>>>    >     *Subject:* RE: PoT review/comments____
> >>>>    >
> >>>>    >     __ __
> >>>>    >
> >>>>    >     We=E2=80=99ve just posted revision -04 of
> >>>>    draft-ietf-sfc-proof-of-transit
> >>>>    >     which now includes support for OPOT configuration in the
> >>>>    yang model;____
> >>>>    >
> >>>>    >     see section 5.2.3 in
> >>>>    > https://www.ietf.org/id/draft-ietf-sfc-proof-of-transit-04.txt.
> >>>> ____
> >>>>    >
> >>>>    >     The main addition is a grouping opot-profile, which adds
> >>>>    upstream
> >>>>    >     and downstream masks that OPOT requires.____
> >>>>    >
> >>>>    >     Thanks to Alejandro for suggesting these updates.____
> >>>>    >
> >>>>    >     __ __
> >>>>    >
> >>>>    >     This fixes the last =E2=80=9Cknown issue=E2=80=9D in
> >>>>    >     draft-ietf-sfc-proof-of-transit. It would be great if you
> >>>>    could give
> >>>>    >     the document another careful read through.
> >>>>    >     Are we ready for WGLC?____
> >>>>    >
> >>>>    >     __ __
> >>>>    >
> >>>>    >     Thanks, Frank____
> >>>>    >
> >>>>    >     __ __
> >>>>    >
> >>>>    >     __ __
> >>>>    >
> >>>>    >     *From:* Alejandro Aguado FI <a.aguadom@fi.upm.es
> >>>> <mailto:a.aguadom@fi.upm.es>
> >>>>    <mailto:a..aguadom@fi.upm.es>
> >>>>    >     <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>>
> >>>>    >     *Sent:* Donnerstag, 12. September 2019 15:40
> >>>>    >     *To:* Diego R. Lopez <diego.r.lopez@telefonica.com
> >>>> <mailto:diego.r.lopez@telefonica.com>
> >>>>    <mailto:diego.r.lopez@telefonica.com>
> >>>>    >     <mailto:diego.r.lopez@telefonica.com
> >>>>    <mailto:diego.r.lopez@telefonica.com>>>; Carlos Pignataro
> (cpignata)
> >>>>    >     <cpignata@cisco.com <mailto:cpignata@cisco.com>
> >>>> <mailto:cpignata@cisco.com>
> >>>>    <mailto:cpignata@cisco.com <mailto:cpignata@cisco..com>>>; Frank
> >>>>    Brockners
> >>>>    >     (fbrockne) <fbrockne@cisco.com <mailto:fbrockne@cisco.com>
> >>>> <mailto:fbrockne@cisco.com>
> >>>>    <mailto:fbrockne@cisco.com <mailto:fbrockne@cisco.com>>>;
> >>>>    >     ALEJANDRO AGUADO MARTIN
> >>>>    <alejandro.aguadomartin.ext@telefonica.com
> >>>> <mailto:alejandro.aguadomartin.ext@telefonica.com>
> >>>>    <mailto:alejandro.aguadomartin.ext@telefonica.com>
> >>>>    >     <mailto:alejandro.aguadomartin.ext@telefonica.com
> >>>>    <mailto:alejandro.aguadomartin..ext@telefonica.com>>>; Shwetha
> >>>>    >     Bhandari (shwethab) <shwethab@cisco.com
> >>>> <mailto:shwethab@cisco.com>
> >>>>    <mailto:shwethab@cisco.com>
> >>>>    >     <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com>>>;
> >>>>    Tal Mizrahi <tal.mizrahi.phd@gmail.com
> >>>> <mailto:tal.mizrahi.phd@gmail.com>
> >>>>    <mailto:tal.mizrahi.phd@gmail.com>
> >>>>    >     <mailto:tal.mizrahi.phd@gmail.com
> >>>>    <mailto:tal.mizrahi.phd@gmail.com>>>
> >>>>    >     *Cc:* sfc@ietf.org <mailto:sfc@ietf.org> <mailto:
> sfc@ietf.org>
> >>>>    <mailto:sfc@ietf.org <mailto:sfc@ietf.org>>
> >>>>    >     *Subject:* Re: PoT review/comments____
> >>>>    >
> >>>>    >     __ __
> >>>>    >
> >>>>    >     Hi Shwetha,____
> >>>>    >
> >>>>    >     __ __
> >>>>    >
> >>>>    >     Yes, I think it is a good idea. From your points, the secon=
d
> >>>>    one is
> >>>>    >     a bit confusing to me... But I do not fully remember how th=
e
> >>>>    model
> >>>>    >     was structured, so I need to revise the document.____
> >>>>    >
> >>>>    >     __ __
> >>>>    >
> >>>>    >     Give me a day or two to explore again the model, and either
> we
> >>>>    >     exchange few emails with proposals for the extension, or we
> can
> >>>>    >     organise a quick call during next week to close a final
> >>>>    proposal to
> >>>>    >     share with other contributors.____
> >>>>    >
> >>>>    >     __ __
> >>>>    >
> >>>>    >     Thanks!____
> >>>>    >
> >>>>    >     __ __
> >>>>    >
> >>>>    >     Best,____
> >>>>    >
> >>>>    >     Alejandro____
> >>>>    >
> >>>>    >     __ __
> >>>>    >
> >>>>    >     __ __
> >>>>    >
> >>>>    >     El 12 de septiembre de 2019 a las 8:52:44, Shwetha Bhandari
> >>>>    >     (shwethab) (shwethab@cisco.com <mailto:shwethab@cisco.com>
> >>>> <mailto:shwethab@cisco.com>
> >>>>    <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com>>)
> >>>>    >     escribi=C3=B3:____
> >>>>    >
> >>>>    >     Hi Alejandro, Diego,____
> >>>>    >
> >>>>    >     ____
> >>>>    >
> >>>>    >     Since you added extension to do OPoT, should we extend the
> >>>>    model in
> >>>>    >     draft-ietf-sfc-proof-of-transit to enable OPoT and any
> >>>>    parameters
> >>>>    >     required for it  shared masks per link. If yes my proposal
> >>>>    will be
> >>>>    >     to:____
> >>>>    >
> >>>>    >      1. Augment existing pot-profile with fields to Enable OPoT
> >>>>    and a
> >>>>    >         cipher scheme if needed.____
> >>>>    >      2. Separate container in the model to define a map of (Nod=
e
> >>>>    >         link/interface, mask) to distribute pair wise masks. Fo=
r
> >>>>    e.g.
> >>>>    >         Node link/interface identifier can be UUID as defined i=
n
> >>>>    rfc8348
> >>>>    >         Or____
> >>>>    >      3. Masks can be part of pot-profile.____
> >>>>    >
> >>>>    >     ____
> >>>>    >
> >>>>    >     What do you think about revising the model with this?____
> >>>>    >
> >>>>    >     ____
> >>>>    >
> >>>>    >     Thanks,____
> >>>>    >
> >>>>    >     Shwetha____
> >>>>    >
> >>>>    >     ____
> >>>>    >
> >>>>    >     *From: *"Frank Brockners (fbrockne)" <fbrockne@cisco.com
> >>>> <mailto:fbrockne@cisco.com>
> >>>>    <mailto:fbrockne@cisco.com>
> >>>>    >     <mailto:fbrockne@cisco.com <mailto:fbrockne@cisco.com>>>
> >>>>    >     *Date: *Wednesday, September 11, 2019 at 2:34 PM
> >>>>    >     *To: *ALEJANDRO AGUADO MARTIN
> >>>>    >     <alejandro.aguadomartin.ext@telefonica.com
> >>>> <mailto:alejandro.aguadomartin.ext@telefonica.com>
> >>>>    <mailto:alejandro.aguadomartin.ext@telefonica.com>
> >>>>    >     <mailto:alejandro.aguadomartin.ext@telefonica.com
> >>>>    <mailto:alejandro.aguadomartin..ext@telefonica.com>>>, "Diego R.
> >>>>    >     Lopez" <diego.r.lopez@telefonica.com
> >>>> <mailto:diego.r.lopez@telefonica.com>
> >>>>    <mailto:diego.r.lopez@telefonica.com>
> >>>>    >     <mailto:diego.r..lopez@telefonica.com
> >>>>    <mailto:diego.r..lopez@telefonica.com>>>, Carlos Pignataro
> >>>>    >     <cpignata@cisco..com <mailto:cpignata@cisco.com
> >>>>    <mailto:cpignata@cisco.com>>>, Shwetha bhandari
> >>>>    >     <shwethab@cisco.com <mailto:shwethab@cisco.com>
> >>>> <mailto:shwethab@cisco.com>
> >>>>    <mailto:shwethab@cisco.com <mailto:shwethab@cisco..com>>>, Tal
> >>>> Mizrahi
> >>>>    >     <tal.mizrahi.phd@gmail.com <mailto:tal.mizrahi.phd@gmail.co=
m
> >
> >>>>    <mailto:tal.mizrahi.phd@gmail.com>
> >>>>    <mailto:tal.mizrahi.phd@gmail.com
> >>>> <mailto:tal.mizrahi.phd@gmail.com>>>
> >>>>    >     *Cc: *"a..aguadom@fi.upm.es <mailto:a..aguadom@fi.upm.es>
> >>>> <mailto:a..aguadom@fi.upm.es>
> >>>>    <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>"
> >>>>    >     <a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>
> >>>> <mailto:a.aguadom@fi.upm.es>
> >>>>    <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>>,
> >>>>    "sfc@ietf.org <mailto:sfc@ietf.org> <mailto:sfc@ietf.org>
> >>>>    >     <mailto:sfc@ietf.org <mailto:sfc@ietf.org>>" <sfc@ietf.org
> >>>> <mailto:sfc@ietf.org>
> >>>>    <mailto:sfc@ietf.org> <mailto:sfc@ietf.org <mailto:sfc@ietf.org>>=
>
> >>>>    >     *Subject: *RE: PoT review/comments____
> >>>>    >
> >>>>    >     ____
> >>>>    >
> >>>>    >     Hi Alejandro,____
> >>>>    >
> >>>>    >     ____
> >>>>    >
> >>>>    >     Thanks again for the review. Your comments have been
> >>>>    integrated into
> >>>>    >     draft-ietf-sfc-proof-of-transit-03 which just got posted.__=
__
> >>>>    >
> >>>>    >     ____
> >>>>    >
> >>>>    >     Cheers, Frank____
> >>>>    >
> >>>>    >     ____
> >>>>    >
> >>>>    >     *From:*Frank Brockners (fbrockne)
> >>>>    >     *Sent:* Montag, 27. Mai 2019 18:18
> >>>>    >     *To:* ALEJANDRO AGUADO MARTIN
> >>>>    >     <alejandro.aguadomartin.ext@telefonica.com
> >>>> <mailto:alejandro.aguadomartin.ext@telefonica.com>
> >>>>    <mailto:alejandro.aguadomartin.ext@telefonica.com>
> >>>>    >     <mailto:alejandro.aguadomartin.ext@telefonica.com
> >>>>    <mailto:alejandro.aguadomartin..ext@telefonica.com>>>; Diego R.
> Lopez
> >>>>    >     <diego.r.lopez@telefonica.com
> >>>> <mailto:diego.r.lopez@telefonica.com>
> >>>>    <mailto:diego.r.lopez@telefonica.com>
> >>>>    >     <mailto:diego.r.lopez@telefonica.com
> >>>>    <mailto:diego.r.lopez@telefonica.com>>>; Carlos Pignataro
> (cpignata)
> >>>>    >     <cpignata@cisco.com <mailto:cpignata@cisco.com>
> >>>> <mailto:cpignata@cisco.com>
> >>>>    <mailto:cpignata@cisco.com <mailto:cpignata@cisco..com>>>; Shweth=
a
> >>>>    Bhandari
> >>>>    >     (shwethab) <shwethab@cisco.com <mailto:shwethab@cisco.com>
> >>>> <mailto:shwethab@cisco.com>
> >>>>    <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com>>>; Tal
> >>>>    >     Mizrahi <tal.mizrahi.phd@gmail.com
> >>>> <mailto:tal.mizrahi.phd@gmail.com>
> >>>>    <mailto:tal.mizrahi.phd@gmail..com>
> >>>>    <mailto:tal.mizrahi.phd@gmail.com
> >>>> <mailto:tal.mizrahi.phd@gmail.com>>>
> >>>>    >     *Cc:* a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>
> >>>> <mailto:a.aguadom@fi.upm.es>
> >>>>    <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>;
> >>>> sfc@ietf.org <mailto:sfc@ietf.org> <mailto:sfc@ietf.org>
> >>>>    >     <mailto:sfc@ietf.org <mailto:sfc@ietf.org>>
> >>>>    >     *Subject:* RE: PoT review/comments____
> >>>>    >
> >>>>    >     ____
> >>>>    >
> >>>>    >     Hi Alejandro,____
> >>>>    >
> >>>>    >     ____
> >>>>    >
> >>>>    >     Many thanks for the comments =E2=80=93 and sorry for the de=
lay =E2=80=93
> >>>>    >     unfortunately your email somehow got dropped from my todo
> list.
> >>>>    >     Please see inline=E2=80=A6____
> >>>>    >
> >>>>    >     ____
> >>>>    >
> >>>>    >     (cc=E2=80=99ing the list as well).____
> >>>>    >
> >>>>    >     ____
> >>>>    >
> >>>>    >     *From:*ALEJANDRO AGUADO MARTIN
> >>>>    >     <alejandro.aguadomartin..ext@telefonica.com
> >>>> <mailto:alejandro.aguadomartin..ext@telefonica.com>
> >>>>    <mailto:alejandro.aguadomartin..ext@telefonica.com>
> >>>>    >     <mailto:alejandro.aguadomartin.ext@telefonica.com
> >>>>    <mailto:alejandro.aguadomartin..ext@telefonica.com>>>
> >>>>    >     *Sent:* Montag, 15. April 2019 17:27
> >>>>    >     *To:* Diego R. Lopez <diego.r.lopez@telefonica.com
> >>>> <mailto:diego.r.lopez@telefonica.com>
> >>>>    <mailto:diego.r.lopez@telefonica.com>
> >>>>    >     <mailto:diego.r.lopez@telefonica.com
> >>>>    <mailto:diego.r.lopez@telefonica.com>>>; Carlos Pignataro
> (cpignata)
> >>>>    >     <cpignata@cisco.com <mailto:cpignata@cisco.com>
> >>>> <mailto:cpignata@cisco.com>
> >>>>    <mailto:cpignata@cisco.com <mailto:cpignata@cisco..com>>>; Frank
> >>>>    Brockners
> >>>>    >     (fbrockne) <fbrockne@cisco.com <mailto:fbrockne@cisco.com>
> >>>> <mailto:fbrockne@cisco.com>
> >>>>    <mailto:fbrockne@cisco.com <mailto:fbrockne@cisco.com>>>; Shwetha
> >>>>    >     Bhandari (shwethab) <shwethab@cisco.com
> >>>> <mailto:shwethab@cisco.com>
> >>>>    <mailto:shwethab@cisco.com>
> >>>>    >     <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com>>>;
> >>>>    Tal Mizrahi <tal.mizrahi.phd@gmail.com
> >>>> <mailto:tal.mizrahi.phd@gmail.com>
> >>>>    <mailto:tal.mizrahi.phd@gmail.com>
> >>>>    >     <mailto:tal.mizrahi.phd@gmail.com
> >>>>    <mailto:tal.mizrahi.phd@gmail.com>>>
> >>>>    >     *Cc:* a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>
> >>>> <mailto:a.aguadom@fi.upm.es>
> >>>>    <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>
> >>>>    >     *Subject:* PoT review/comments____
> >>>>    >
> >>>>    >     ____
> >>>>    >
> >>>>    >     Dear all,____
> >>>>    >
> >>>>    >     ____
> >>>>    >
> >>>>    >     I gave a quick review to the PoT document. Some comments:__=
__
> >>>>    >
> >>>>    >     ____
> >>>>    >
> >>>>    >     - I read =E2=80=9CThe non-constant coefficients are used to
> >>>> generate the
> >>>>    >     Lagrange Polynomial Constants (LPC).=E2=80=9D As far as I
> >>>>    understood, the
> >>>>    >     points assigned to each node (Xi) are the ones used for
> >>>>    generating
> >>>>    >     the LPCi, aren=E2=80=99t they?____
> >>>>    >
> >>>>    >     */=E2=80=A6FB: Good catch. The LPCs are of course computed =
using
> (x_i,
> >>>>    >     y_i)./*____
> >>>>    >
> >>>>    >     - If we go for including the YANG in the current document
> >>>>    (which I
> >>>>    >     agree), parameters should be described before the yang
> >>>>    definition,
> >>>>    >     and maybe it would be helpful to have the yang tree (see th=
e
> >>>>    current
> >>>>    >     version attached).____
> >>>>    >
> >>>>    >     */=E2=80=A6FB: Thanks. IMHO it makes sense to keep the YANG=
 model
> >>>> in the
> >>>>    >     current doc, given that the model and the description go
> >>>> hand in
> >>>>    >     hand. We can of course also include the yang tree to make
> >>>>    reading
> >>>>    >     easier. This is consistent with other documents which
> >>>>    specify YANG
> >>>>    >     models./*____
> >>>>    >
> >>>>    >     - I include in the attached file few questions about naming
> >>>>    of some
> >>>>    >     parameters.____
> >>>>    >
> >>>>    >     *//*____
> >>>>    >
> >>>>    >     */=E2=80=A6FB:
> >>>>    >     - naming F_i(x_i, y_i) =E2=80=93 I agree that a better name=
 could be
> >>>>    used.
> >>>>    >     The only potential concern would be that the open source
> >>>>    >     implementation in OpenDaylight uses this naming =E2=80=93 c=
hanging
> >>>>    it might
> >>>>    >     lead to confusion.. We can start with adding a comment to
> make
> >>>>    >     things clearer./*____
> >>>>    >
> >>>>    >     *//*____
> >>>>    >
> >>>>    >     */- secret key =E2=80=93 this is the constant part of the f=
irst
> >>>>    polynomial
> >>>>    >     which serves as the secret =E2=80=93 and which is re-retrie=
ved.
> >>>>    Again, we
> >>>>    >     can update the description to make things clearer./*____
> >>>>    >
> >>>>    >     *//*____
> >>>>    >
> >>>>    >     */- size of the random number: This is unrelated to OPOT.
> >>>>    The random
> >>>>    >     number is to uniquely identify a packet. There is a trade-o=
ff
> >>>>    >     between the size of the random number and how often you nee=
d
> to
> >>>>    >     re-key your system. At high speeds, the random number =E2=
=80=93 which
> >>>>    >     identifies a particular packet =E2=80=93 is used up quite q=
uickly if
> >>>>    it is
> >>>>    >     only 32-bit wide. See section 4
> >>>>    >
> >>>>        /*
> https://tools.ietf.org/html/draft-ietf-sfc-proof-of-transit-02#section-4_=
___
> >>>>    >
> >>>>    >     *//*____
> >>>>    >
> >>>>    >     */- number of profiles: For a deployment which is expected
> >>>>    to renew
> >>>>    >     keys every now and then (e.g. you run with 32-bit random
> >>>>    numbers at
> >>>>    >     reasonably high speeds), you need at least 2 profiles =E2=
=80=93 an
> >>>>    active
> >>>>    >     one and one that you can activate once you run out of rando=
m
> >>>>    numbers
> >>>>    >     (which is what the encapsulating node would decide).. /*___=
_
> >>>>    >
> >>>>    >     - I have checked some of the existing YANG files within the
> >>>>    IETF to
> >>>>    >     see in which it would be helpful to include. From the (not
> >>>>    so) old
> >>>>    >     OpenFlow, I assume that one match is necessary (for
> >>>> identify the
> >>>>    >     iOAM/PoT header) whilst the source node can use any existin=
g
> >>>>    match
> >>>>    >     field to identify packets where to apply the PoT scheme. In
> >>>>    terms of
> >>>>    >     actions, I would say that two may be required: for any node=
,
> an
> >>>>    >     update-pot is necessary, while the verifier would need a
> >>>>    verify-pot
> >>>>    >     type of action, that would ideally either remove the header
> >>>>    or drop
> >>>>    >     the packet if fails (I do not know if you are thinking in
> more
> >>>>    >     complex scenarios).____
> >>>>    >
> >>>>    >     *//*____
> >>>>    >
> >>>>    >     */=E2=80=A6FB: From an OF perspective, that sounds feasible=
.. That
> >>>>    said, we
> >>>>    >     probably want to avoid making the spec specific to a
> >>>>    technology like
> >>>>    >     OF, hence would suggest that we don=E2=80=99t specify such =
a
> >>>> behavior as
> >>>>    >     part of this document./*____
> >>>>    >
> >>>>    >     *//*____
> >>>>    >
> >>>>    >     - For this last point, I have seen the definitions within
> >>>>    >     draft-asechoud-rtgwg-qos-model-08, where matched could map
> >>>>    (if I am
> >>>>    >     not wrong) to classifiers/filters, and actions to actions. =
I
> >>>>    send
> >>>>    >     you the models in a zip file. In this sense the model to be
> >>>>    defined
> >>>>    >     in the PoT shall be an augment of the models defined in tha=
t
> >>>>    >     document. I have not done a very deep revision on the model=
,
> >>>>    but I
> >>>>    >     think it could fit there. If you have check this or other
> >>>>    models,
> >>>>    >     let me know so I could also help.____
> >>>>    >
> >>>>    >     *//*____
> >>>>    >
> >>>>    >     */=E2=80=A6FB: Per my note above: In order to keep POT gene=
ric and
> >>>>    not link
> >>>>    >     it to a particular classification mechanism, I=E2=80=99d pr=
efer to
> >>>>    keep the
> >>>>    >     classification question as out of scope for the current
> >>>>    document.
> >>>>    >     That way it can also apply to technologies which come with
> >>>>    their own
> >>>>    >     way to classify =E2=80=93 and which might fully decouple th=
e
> tunneling
> >>>>    >     aspects from the classification aspects. /*____
> >>>>    >
> >>>>    >     ____
> >>>>    >
> >>>>    >     Thanks a lot and sorry for such long email.____
> >>>>    >
> >>>>    >     ____
> >>>>    >
> >>>>    >     */..FB: Thanks again for all your comments. We=E2=80=99ll g=
et them
> >>>>    included
> >>>>    >     in the next revision. /*____
> >>>>    >
> >>>>    >     *//*____
> >>>>    >
> >>>>    >     */Cheers, Frank/*____
> >>>>    >
> >>>>    >     ____
> >>>>    >
> >>>>    >     ____
> >>>>    >
> >>>>    >     ____
> >>>>    >
> >>>>    >     Best,____
> >>>>    >
> >>>>    >     Alejandro____
> >>>>    >
> >>>>    >     ____
> >>>>    >
> >>>>    >     ____
> >>>>    >
> >>>>    >     ____
> >>>>    >
> >>>>    >     ____
> >>>>    >
> >>>>    >
> >>>>
>        ------------------------------------------------------------------=
------
> >>>>    >
> >>>>    >
> >>>>    >     Este mensaje y sus adjuntos se dirigen exclusivamente a su
> >>>>    >     destinatario, puede contener informaci=C3=B3n privilegiada =
o
> >>>>    confidencial
> >>>>    >     y es para uso exclusivo de la persona o entidad de destino.
> >>>>    Si no es
> >>>>    >     usted. el destinatario indicado, queda notificado de que la
> >>>>    lectura,
> >>>>    >     utilizaci=C3=B3n, divulgaci=C3=B3n y/o copia sin autorizaci=
=C3=B3n puede
> estar
> >>>>    >     prohibida en virtud de la legislaci=C3=B3n vigente. Si ha
> >>>>    recibido este
> >>>>    >     mensaje por error, le rogamos que nos lo comunique
> >>>>    inmediatamente
> >>>>    >     por esta misma v=C3=ADa y proceda a su destrucci=C3=B3n.
> >>>>    >
> >>>>    >     The information contained in this transmission is
> >>>> privileged and
> >>>>    >     confidential information intended only for the use of the
> >>>>    individual
> >>>>    >     or entity named above. If the reader of this message is not
> the
> >>>>    >     intended recipient, you are hereby notified that any
> >>>>    dissemination,
> >>>>    >     distribution or copying of this communication is strictly
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,
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> >>>>    >     destinat=C3=A1rio, pode conter informa=C3=A7=C3=A3o privile=
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 Se
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o de
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=C3=B3pia sem autoriza=C3=A7=C3=A3o
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Se recebeu
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--00000000000030406105a23f4b21
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div dir=3D"ltr">Dear All,<div>I agree with Joel that the =
reference in draft-ietf-sfc-proof-of-transit to draft-ietf-ippm-ioam-data s=
hould be normative. I also support=C2=A0the proposal to add in draft-ietf-s=
fc-proof-of-transit a normative reference to draft-ietf-sfc-ioam-nsh. SFC W=
G is working on defining SFC that is based on NSH (SFC NSH), and while SFC =
might be realized using other techniques, draft-ietf-sfc-ioam-nsh is, and l=
ikely will remain, the only document that is describing iOAM encapsulation =
in SFC NSH. Thus, I believe, for SFC WG, implementation of PoT based on iOA=
M requires implementation of iOAM encapsulation in SFC NSH, as defined in d=
raft-ietf-sfc-ioam-nsh. Hence, the reference must be normative.</div><div><=
br></div><div>Regards,</div><div>Greg</div></div><br><div class=3D"gmail_qu=
ote"><div dir=3D"ltr" class=3D"gmail_attr">On Tue, Mar 24, 2020 at 2:25 PM =
Joel M. Halpern &lt;<a href=3D"mailto:jmh@joelhalpern.com">jmh@joelhalpern.=
com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"marg=
in:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1e=
x">I think we all agree that draft-ietf-sfc-proof-of-transit requires the <=
br>
normative reference to draft-ietf-ippm-ioam-data.<br>
<br>
Regarding a reference from draft-ietf-sfc-proof-of-transit to <br>
draft-ietf-sfc-ioam-nsh, I think we agree that it is needed.=C2=A0 The <br>
question then is normative or informative.=C2=A0 If we use the usual IETF <=
br>
rule that there has to be a defined normative way to interoperably <br>
implement a protocol spec (with other options allowed), my inclination <br>
is that the reference should be normative.<br>
<br>
Regarding the informative reference in the other direction from <br>
draft-ietf-sfc-ioam-nsh to draft-ietf-sfc-proof-of-transit, while I <br>
personally like the idea, that is up to you / the working group.<br>
<br>
Yours,<br>
Joel<br>
<br>
On 3/24/2020 5:20 PM, Carlos Pignataro (cpignata) wrote:<br>
&gt; Hi, Joel,<br>
&gt; <br>
&gt; The way in which the doc hierarchy and relationship is structure seems=
 <br>
&gt; to support and potentially even require:<br>
&gt; <br>
&gt; From=C2=A0draft-ietf-sfc-proof-of-transit:<br>
&gt; * A normative reference to [I-D.ietf-ippm-ioam-data], since PoT gives =
<br>
&gt; over IOAM explicitly, and that exists.<br>
&gt; * Optionally, an Informative reference to=C2=A0draft-ietf-sfc-ioam-nsh=
, since <br>
&gt; that=E2=80=99s really one out of many ways to carry IOAM over NSH, but=
 separated <br>
&gt; by document indirection. This does not exist but can be added.<br>
&gt; <br>
&gt;=C2=A0 From draft-ietf-sfc-ioam-nsh:<br>
&gt; * Optionally, an Informative reference to <br>
&gt; draft-ietf-sfc-proof-of-transit, since that=E2=80=99s one out of many =
<br>
&gt; applications. This does not exist but can be added.<br>
&gt; <br>
&gt; Thoughts?<br>
&gt; <br>
&gt; Best,<br>
&gt; <br>
&gt; Carlos.<br>
&gt; <br>
&gt;&gt; 2020/03/24 =E5=8D=88=E5=BE=8C5:10=E3=80=81Joel M. Halpern &lt;<a h=
ref=3D"mailto:jmh@joelhalpern.com" target=3D"_blank">jmh@joelhalpern.com</a=
> <br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:jmh@joelhalpern.com" target=3D"_blank=
">jmh@joelhalpern.com</a>&gt;&gt;=E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:<br>
&gt;&gt;<br>
&gt;&gt; Carlos, it sounds like there should probably be a normative refere=
nce <br>
&gt;&gt; from draft-ietf-sfc-proof of transit to draft-ietf-sfc-ioam-nsh? <=
br>
&gt;&gt; Possibly in the same sentence that refers to draft-ietf-ippm-ioam-=
data?<br>
&gt;&gt;<br>
&gt;&gt; Yours,<br>
&gt;&gt; Joel<br>
&gt;&gt;<br>
&gt;&gt; On 3/24/2020 4:54 PM, Carlos Pignataro (cpignata) wrote:<br>
&gt;&gt;&gt; Greg,<br>
&gt;&gt;&gt; The very first sentence of the PoT document reads:<br>
&gt;&gt;&gt; =C2=A0 =C2=A0Several technologies such as Traffic Engineering =
(TE), Service<br>
&gt;&gt;&gt; =C2=A0 =C2=A0Function Chaining (SFC), and policy based routing=
 are used to steer<br>
&gt;&gt;&gt; =C2=A0 =C2=A0traffic through a specific, user-defined path.=C2=
=A0 This document defines<br>
&gt;&gt;&gt; Explaining how this document is applicable to various <br>
&gt;&gt;&gt; traffic-steering technologies.<br>
&gt;&gt;&gt; Section 3 then explains:<br>
&gt;&gt;&gt; =C2=A0 =C2=A0The POT information is encapsulated in packets as=
 an IOAM Proof Of<br>
&gt;&gt;&gt; =C2=A0 =C2=A0Transit Option.=C2=A0 The details and format of t=
he encapsulation and the<br>
&gt;&gt;&gt; =C2=A0 =C2=A0POT Option format are specified in [I-D.ietf-ippm=
-ioam-data].<br>
&gt;&gt;&gt; Which shows how to carry PoT in IOAM, with an appropriate poin=
ter.<br>
&gt;&gt;&gt; Lastly, draft-ietf-sfc-ioam-nsh-03 defines IOAM over an NSH <b=
r>
&gt;&gt;&gt; encapsulation.<br>
&gt;&gt;&gt; This arrangements maximizes specification modularity and <br>
&gt;&gt;&gt; portability/reusability.<br>
&gt;&gt;&gt; Best,<br>
&gt;&gt;&gt; Carlos.<br>
&gt;&gt;&gt;&gt; 2020/03/24 =E5=8D=88=E5=BE=8C4:48=E3=80=81Greg Mirsky &lt;=
<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmai=
l.com</a> <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:gregimirsky@gmail.com" target=
=3D"_blank">gregimirsky@gmail.com</a>&gt; &lt;mailto:<a href=3D"mailto:greg=
imirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.com</a>&gt;&gt;=E3=
=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:<br>
&gt;&gt;&gt;&gt;<br>
&gt;&gt;&gt;&gt; Hi Joel,<br>
&gt;&gt;&gt;&gt; thank you for the most expedient response. As I understand=
 it, iOAM <br>
&gt;&gt;&gt;&gt; Data draft describes the format of the informational eleme=
nt that <br>
&gt;&gt;&gt;&gt; carries POT-related information but it does not define how=
 the <br>
&gt;&gt;&gt;&gt; element to be carried in case of NSH encapsulation. And th=
at is what <br>
&gt;&gt;&gt;&gt; I was asking, apologies for not being clear in my first no=
te.<br>
&gt;&gt;&gt;&gt;<br>
&gt;&gt;&gt;&gt; Regards,<br>
&gt;&gt;&gt;&gt; Greg<br>
&gt;&gt;&gt;&gt;<br>
&gt;&gt;&gt;&gt; On Tue, Mar 24, 2020 at 1:42 PM Joel M.. Halpern <br>
&gt;&gt;&gt;&gt; &lt;<a href=3D"mailto:jmh@joelhalpern.com" target=3D"_blan=
k">jmh@joelhalpern.com</a> &lt;mailto:<a href=3D"mailto:jmh@joelhalpern.com=
" target=3D"_blank">jmh@joelhalpern.com</a>&gt; <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:jmh@joelhalpern.com" target=
=3D"_blank">jmh@joelhalpern.com</a>&gt;&gt; wrote:<br>
&gt;&gt;&gt;&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0Regarding the information carriage, the =
PoT document points to the<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0IOAM<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0document.<br>
&gt;&gt;&gt;&gt; <a href=3D"https://tools.ietf.org/html/draft-ietf-ippm-ioa=
m-data-08#section-4.5" rel=3D"noreferrer" target=3D"_blank">https://tools.i=
etf.org/html/draft-ietf-ippm-ioam-data-08#section-4.5</a><br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0gives the format (and ways to have other=
 formats if needed.)<br>
&gt;&gt;&gt;&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0Yours,<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0Joel<br>
&gt;&gt;&gt;&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0On 3/24/2020 4:26 PM, Greg Mirsky wrote:=
<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt; Hi Frank,<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt; thank you for reminding us about th=
is important work, indeed we<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0should<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt; complete it. I&#39;ve reviewed the =
draft and have several questions.<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0Please<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt; kindly consider:<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0* I couldn&#39;t find i=
nformation where, relative to NSH, RND and<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0CML are<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0transported<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0* for YANG data models =
using &quot;reference&quot; is strongly<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0encouraged as it<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0provides a point=
er to the specification. Since the POT data<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0model is<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0in the same docu=
ment as the POT specification, listing the<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0appropriate sect=
ion should suffice<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt; Regards,<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt; Greg<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt; On Thu, Mar 19, 2020 at 6:45 AM Fra=
nk Brockners (fbrockne)<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt; &lt;fbrockne=3D<a href=3D"mailto:40=
cisco.com@dmarc.ietf.org" target=3D"_blank">40cisco.com@dmarc.ietf.org</a> =
<br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:fbrockne" target=3D"_blank">f=
brockne</a>=3D<a href=3D"mailto:40cisco.com@dmarc.ietf.org" target=3D"_blan=
k">40cisco.com@dmarc.ietf.org</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:40cisco.com=
@dmarc.ietf.org" target=3D"_blank">40cisco.com@dmarc.ietf.org</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt; &lt;mailto:<a href=3D"mailto:40cisc=
o.com@dmarc.ietf.org" target=3D"_blank">40cisco.com@dmarc.ietf.org</a><br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:40cisco.com=
@dmarc.ietf.org" target=3D"_blank">40cisco.com@dmarc.ietf.org</a>&gt;&gt;&g=
t; wrote:<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Dear SFC WG,____=
<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0It=E2=80=99s bee=
n a while since we posted<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0draft-ietf-sfc-proof-of-transit-04<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0which addressed =
all known comments =E2=80=93 see below.<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0I=E2=80=99ve not=
 seen any more recent comments or questions come up<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0=E2=80=93 and<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0we=E2=80=99ve be=
en through quite a few discussions and reviews of this<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0document already=
.____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Thus the questio=
n: Are we ready for WG LC?____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Thanks, Frank___=
_<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*From:* Frank Br=
ockners (fbrockne)<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*Sent:* Donnerst=
ag, 21. November 2019 08:21<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*To:* Alejandro =
Aguado FI &lt;<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.ag=
uadom@fi.upm.es</a> <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es" target=
=3D"_blank">a.aguadom@fi.upm.es</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:a.aguadom@f=
i.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a>=
 &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.agua=
dom@fi.upm.es</a>&gt;&gt;&gt;;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0Diego R. Lopez<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=3D"m=
ailto:diego.r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@telefon=
ica.com</a> <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:diego.r.lopez@telefonica.com"=
 target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:diego.r.lop=
ez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<b=
r>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@=
telefonica.com</a><br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:diego.r.lop=
ez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;&g=
t;&gt;; Carlos Pignataro (cpignata)<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=3D"m=
ailto:cpignata@cisco.com" target=3D"_blank">cpignata@cisco.com</a> &lt;mail=
to:<a href=3D"mailto:cpignata@cisco.com" target=3D"_blank">cpignata@cisco.c=
om</a>&gt; <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:cpignata@cisco.com" target=3D=
"_blank">cpignata@cisco.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:cpignata@ci=
sco.com" target=3D"_blank">cpignata@cisco.com</a> &lt;mailto:<a href=3D"mai=
lto:cpignata@cisco." target=3D"_blank">cpignata@cisco.</a>.com&gt;&gt;&gt;;=
<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0ALEJANDRO AGUADO<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0MARTIN &lt;<a hr=
ef=3D"mailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_blank">a=
lejandro.aguadomartin.ext@telefonica.com</a> <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:alejandro.aguadomartin.ext@te=
lefonica.com" target=3D"_blank">alejandro.aguadomartin.ext@telefonica.com</=
a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:alejandro.a=
guadomartin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin..=
ext@telefonica.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_blank">a=
lejandro.aguadomartin.ext@telefonica.com</a><br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:alejandro.a=
guadomartin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin..=
ext@telefonica.com</a>&gt;&gt;&gt;; Shwetha<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Bhandari (shweth=
ab) &lt;<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@ci=
sco.com</a> <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:shwethab@cisco.com" target=3D=
"_blank">shwethab@cisco.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:shwethab@ci=
sco.com" target=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com</a> &=
lt;mailto:<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@=
cisco.com</a>&gt;&gt;&gt;;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0Tal Mizrahi &lt;<a href=3D"mailto:tal.mi=
zrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a> <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:tal.mizrahi.phd@gmail.com" ta=
rget=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:tal.mizrahi=
.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:tal.mizrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@g=
mail.com</a><br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:tal.mizrahi=
.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;&gt;&gt;=
<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*Cc:* <a href=3D=
"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a href=
=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt; &lt;mailto:=
<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:sfc@ietf.or=
g" target=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a href=3D"mailto:sfc@ietf=
.org" target=3D"_blank">sfc@ietf.org</a>&gt;&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*Subject:* RE: P=
oT review/comments____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0We=E2=80=99ve ju=
st posted revision -04 of<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0draft-ietf-sfc-proof-of-transit<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0which now includ=
es support for OPOT configuration in the<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0yang model;____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0see section 5.2.=
3 in<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt; <a href=3D"https://www.ietf.org/id/=
draft-ietf-sfc-proof-of-transit-04.txt" rel=3D"noreferrer" target=3D"_blank=
">https://www.ietf.org/id/draft-ietf-sfc-proof-of-transit-04.txt</a>. <br>
&gt;&gt;&gt;&gt; ____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0The main additio=
n is a grouping opot-profile, which adds<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0upstream<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0and downstream m=
asks that OPOT requires.____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Thanks to Alejan=
dro for suggesting these updates.____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0This fixes the l=
ast =E2=80=9Cknown issue=E2=80=9D in<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0draft-ietf-sfc-p=
roof-of-transit. It would be great if you<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0could give<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0the document ano=
ther careful read through.<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Are we ready for=
 WGLC?____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Thanks, Frank___=
_<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*From:* Alejandr=
o Aguado FI &lt;<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.=
aguadom@fi.upm.es</a> <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es" target=
=3D"_blank">a.aguadom@fi.upm.es</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:a..aguadom@=
fi.upm.es" target=3D"_blank">a..aguadom@fi.upm.es</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a>=
 &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.agua=
dom@fi.upm.es</a>&gt;&gt;&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*Sent:* Donnerst=
ag, 12. September 2019 15:40<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*To:* Diego R. L=
opez &lt;<a href=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_blank">=
diego.r.lopez@telefonica.com</a> <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:diego.r.lopez@telefonica.com"=
 target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:diego.r.lop=
ez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<b=
r>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@=
telefonica.com</a><br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:diego.r.lop=
ez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;&g=
t;&gt;; Carlos Pignataro (cpignata)<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=3D"m=
ailto:cpignata@cisco.com" target=3D"_blank">cpignata@cisco.com</a> &lt;mail=
to:<a href=3D"mailto:cpignata@cisco.com" target=3D"_blank">cpignata@cisco.c=
om</a>&gt; <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:cpignata@cisco.com" target=3D=
"_blank">cpignata@cisco.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:cpignata@ci=
sco.com" target=3D"_blank">cpignata@cisco.com</a> &lt;mailto:<a href=3D"mai=
lto:cpignata@cisco." target=3D"_blank">cpignata@cisco.</a>.com&gt;&gt;&gt;;=
 Frank<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0Brockners<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0(fbrockne) &lt;<=
a href=3D"mailto:fbrockne@cisco.com" target=3D"_blank">fbrockne@cisco.com</=
a> &lt;mailto:<a href=3D"mailto:fbrockne@cisco.com" target=3D"_blank">fbroc=
kne@cisco.com</a>&gt; <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:fbrockne@cisco.com" target=3D=
"_blank">fbrockne@cisco.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:fbrockne@ci=
sco.com" target=3D"_blank">fbrockne@cisco.com</a> &lt;mailto:<a href=3D"mai=
lto:fbrockne@cisco.com" target=3D"_blank">fbrockne@cisco.com</a>&gt;&gt;&gt=
;;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0ALEJANDRO AGUADO=
 MARTIN<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;<a href=3D"mailto:alejandro.aguadoma=
rtin.ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin.ext@telef=
onica.com</a> <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:alejandro.aguadomartin.ext@te=
lefonica.com" target=3D"_blank">alejandro.aguadomartin.ext@telefonica.com</=
a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:alejandro.a=
guadomartin.ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin.ex=
t@telefonica.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_blank">a=
lejandro.aguadomartin.ext@telefonica.com</a><br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:alejandro.a=
guadomartin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin..=
ext@telefonica.com</a>&gt;&gt;&gt;; Shwetha<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Bhandari (shweth=
ab) &lt;<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@ci=
sco.com</a> <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:shwethab@cisco.com" target=3D=
"_blank">shwethab@cisco.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:shwethab@ci=
sco.com" target=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com</a> &=
lt;mailto:<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@=
cisco.com</a>&gt;&gt;&gt;;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0Tal Mizrahi &lt;<a href=3D"mailto:tal.mi=
zrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a> <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:tal.mizrahi.phd@gmail.com" ta=
rget=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:tal.mizrahi=
.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:tal.mizrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@g=
mail.com</a><br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:tal.mizrahi=
.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;&gt;&gt;=
<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*Cc:* <a href=3D=
"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a href=
=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt; &lt;mailto:=
<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:sfc@ietf.or=
g" target=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a href=3D"mailto:sfc@ietf=
.org" target=3D"_blank">sfc@ietf.org</a>&gt;&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*Subject:* Re: P=
oT review/comments____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Hi Shwetha,____<=
br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Yes, I think it =
is a good idea. From your points, the second<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0one is<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0a bit confusing =
to me... But I do not fully remember how the<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0model<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0was structured, =
so I need to revise the document.____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Give me a day or=
 two to explore again the model, and either we<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0exchange few ema=
ils with proposals for the extension, or we can<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0organise a quick=
 call during next week to close a final<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0proposal to<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0share with other=
 contributors.____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Thanks!____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Best,____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Alejandro____<br=
>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0El 12 de septiem=
bre de 2019 a las 8:52:44, Shwetha Bhandari<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0(shwethab) (<a h=
ref=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com</a> =
&lt;mailto:<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab=
@cisco.com</a>&gt; <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:shwethab@cisco.com" target=3D=
"_blank">shwethab@cisco.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:shwethab@ci=
sco.com" target=3D"_blank">shwethab@cisco.com</a> &lt;mailto:<a href=3D"mai=
lto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com</a>&gt;&gt;)<b=
r>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0escribi=C3=B3:__=
__<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Hi Alejandro, Di=
ego,____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Since you added =
extension to do OPoT, should we extend the<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0model in<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0draft-ietf-sfc-p=
roof-of-transit to enable OPoT and any<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0parameters<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0required for it =
=C2=A0shared masks per link. If yes my proposal<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0will be<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0to:____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0 1. Augment exis=
ting pot-profile with fields to Enable OPoT<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0and a<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0ci=
pher scheme if needed.____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0 2. Separate con=
tainer in the model to define a map of (Node<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0li=
nk/interface, mask) to distribute pair wise masks. For<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0e.g.<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0No=
de link/interface identifier can be UUID as defined in<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0rfc8348<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Or=
____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0 3. Masks can be=
 part of pot-profile.____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0What do you thin=
k about revising the model with this?____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Thanks,____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Shwetha____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*From: *&quot;Fr=
ank Brockners (fbrockne)&quot; &lt;<a href=3D"mailto:fbrockne@cisco.com" ta=
rget=3D"_blank">fbrockne@cisco.com</a> <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:fbrockne@cisco.com" target=3D=
"_blank">fbrockne@cisco.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:fbrockne@ci=
sco.com" target=3D"_blank">fbrockne@cisco.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:fbrockne@cisco.com" target=3D"_blank">fbrockne@cisco.com</a> &=
lt;mailto:<a href=3D"mailto:fbrockne@cisco.com" target=3D"_blank">fbrockne@=
cisco.com</a>&gt;&gt;&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*Date: *Wednesda=
y, September 11, 2019 at 2:34 PM<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*To: *ALEJANDRO =
AGUADO MARTIN<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=3D"m=
ailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_blank">alejandr=
o.aguadomartin.ext@telefonica.com</a> <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:alejandro.aguadomartin.ext@te=
lefonica.com" target=3D"_blank">alejandro.aguadomartin.ext@telefonica.com</=
a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:alejandro.a=
guadomartin.ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin.ex=
t@telefonica.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_blank">a=
lejandro.aguadomartin.ext@telefonica.com</a><br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:alejandro.a=
guadomartin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin..=
ext@telefonica.com</a>&gt;&gt;&gt;, &quot;Diego R.<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Lopez&quot; &lt;=
<a href=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_blank">diego.r.l=
opez@telefonica.com</a> <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:diego.r.lopez@telefonica.com"=
 target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:diego.r.lop=
ez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<b=
r>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:diego.r..lopez@telefonica.com" target=3D"_blank">diego.r..lope=
z@telefonica.com</a><br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:diego.r..lo=
pez@telefonica.com" target=3D"_blank">diego.r..lopez@telefonica.com</a>&gt;=
&gt;&gt;, Carlos Pignataro<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;cpignata@cis=
co..com &lt;mailto:<a href=3D"mailto:cpignata@cisco.com" target=3D"_blank">=
cpignata@cisco.com</a><br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:cpignata@ci=
sco.com" target=3D"_blank">cpignata@cisco.com</a>&gt;&gt;&gt;, Shwetha bhan=
dari<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=3D"m=
ailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com</a> &lt;mail=
to:<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.c=
om</a>&gt; <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:shwethab@cisco.com" target=3D=
"_blank">shwethab@cisco.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:shwethab@ci=
sco.com" target=3D"_blank">shwethab@cisco.com</a> &lt;mailto:<a href=3D"mai=
lto:shwethab@cisco." target=3D"_blank">shwethab@cisco.</a>.com&gt;&gt;&gt;,=
 Tal <br>
&gt;&gt;&gt;&gt; Mizrahi<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=3D"m=
ailto:tal.mizrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.co=
m</a> &lt;mailto:<a href=3D"mailto:tal.mizrahi.phd@gmail.com" target=3D"_bl=
ank">tal.mizrahi.phd@gmail.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:tal.mizrahi=
.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:tal.mizrahi=
.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a> <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:tal.mizrahi.phd@gmail.com" ta=
rget=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;&gt;&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*Cc: *&quot;<a h=
ref=3D"mailto:a..aguadom@fi.upm.es" target=3D"_blank">a..aguadom@fi.upm.es<=
/a> &lt;mailto:<a href=3D"mailto:a..aguadom@fi.upm.es" target=3D"_blank">a.=
.aguadom@fi.upm.es</a>&gt; <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:a..aguadom@fi.upm.es" target=
=3D"_blank">a..aguadom@fi.upm.es</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:a.aguadom@f=
i.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a> &lt;mailto:<a href=3D"m=
ailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a>&gt;&gt=
;&quot;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=3D"m=
ailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a> &lt;ma=
ilto:<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.=
upm.es</a>&gt; <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es" target=
=3D"_blank">a.aguadom@fi.upm.es</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:a.aguadom@f=
i.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a> &lt;mailto:<a href=3D"m=
ailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a>&gt;&gt=
;&gt;,<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&quot;<a href=3D"mailto:sfc@ietf.org" ta=
rget=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a href=3D"mailto:sfc@ietf.org"=
 target=3D"_blank">sfc@ietf.org</a>&gt; &lt;mailto:<a href=3D"mailto:sfc@ie=
tf.org" target=3D"_blank">sfc@ietf.org</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a=
 href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt;&gt;&qu=
ot; &lt;<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a> =
<br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:sfc@ietf.org" target=3D"_blan=
k">sfc@ietf.org</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:sfc@ietf.or=
g" target=3D"_blank">sfc@ietf.org</a>&gt; &lt;mailto:<a href=3D"mailto:sfc@=
ietf.org" target=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a href=3D"mailto:s=
fc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt;&gt;&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*Subject: *RE: P=
oT review/comments____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Hi Alejandro,___=
_<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Thanks again for=
 the review. Your comments have been<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0integrated into<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0draft-ietf-sfc-p=
roof-of-transit-03 which just got posted.____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Cheers, Frank___=
_<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*From:*Frank Bro=
ckners (fbrockne)<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*Sent:* Montag, =
27. Mai 2019 18:18<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*To:* ALEJANDRO =
AGUADO MARTIN<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=3D"m=
ailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_blank">alejandr=
o.aguadomartin.ext@telefonica.com</a> <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:alejandro.aguadomartin.ext@te=
lefonica.com" target=3D"_blank">alejandro.aguadomartin.ext@telefonica.com</=
a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:alejandro.a=
guadomartin.ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin.ex=
t@telefonica.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_blank">a=
lejandro.aguadomartin.ext@telefonica.com</a><br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:alejandro.a=
guadomartin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin..=
ext@telefonica.com</a>&gt;&gt;&gt;; Diego R. Lopez<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=3D"m=
ailto:diego.r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@telefon=
ica.com</a> <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:diego.r.lopez@telefonica.com"=
 target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:diego.r.lop=
ez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<b=
r>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@=
telefonica.com</a><br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:diego.r.lop=
ez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;&g=
t;&gt;; Carlos Pignataro (cpignata)<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=3D"m=
ailto:cpignata@cisco.com" target=3D"_blank">cpignata@cisco.com</a> &lt;mail=
to:<a href=3D"mailto:cpignata@cisco.com" target=3D"_blank">cpignata@cisco.c=
om</a>&gt; <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:cpignata@cisco.com" target=3D=
"_blank">cpignata@cisco.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:cpignata@ci=
sco.com" target=3D"_blank">cpignata@cisco.com</a> &lt;mailto:<a href=3D"mai=
lto:cpignata@cisco." target=3D"_blank">cpignata@cisco.</a>.com&gt;&gt;&gt;;=
 Shwetha<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0Bhandari<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0(shwethab) &lt;<=
a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com</=
a> &lt;mailto:<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwet=
hab@cisco.com</a>&gt; <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:shwethab@cisco.com" target=3D=
"_blank">shwethab@cisco.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:shwethab@ci=
sco.com" target=3D"_blank">shwethab@cisco.com</a> &lt;mailto:<a href=3D"mai=
lto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com</a>&gt;&gt;&gt=
;; Tal<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Mizrahi &lt;<a h=
ref=3D"mailto:tal.mizrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@=
gmail.com</a> <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:tal.mizrahi.phd@gmail.com" ta=
rget=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:tal.mizrahi=
.phd@gmail." target=3D"_blank">tal.mizrahi.phd@gmail.</a>.com&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:tal.mizrahi=
.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a> <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:tal.mizrahi.phd@gmail.com" ta=
rget=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;&gt;&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*Cc:* <a href=3D=
"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a> &lt;=
mailto:<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@f=
i.upm.es</a>&gt; <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es" target=
=3D"_blank">a.aguadom@fi.upm.es</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:a.aguadom@f=
i.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a> &lt;mailto:<a href=3D"m=
ailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a>&gt;&gt=
;;<br>
&gt;&gt;&gt;&gt; <a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf=
.org</a> &lt;mailto:<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@i=
etf.org</a>&gt; &lt;mailto:<a href=3D"mailto:sfc@ietf.org" target=3D"_blank=
">sfc@ietf.org</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a=
 href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt;&gt;<br=
>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*Subject:* RE: P=
oT review/comments____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Hi Alejandro,___=
_<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Many thanks for =
the comments =E2=80=93 and sorry for the delay =E2=80=93<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0unfortunately yo=
ur email somehow got dropped from my todo list.<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Please see inlin=
e=E2=80=A6____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0(cc=E2=80=99ing =
the list as well).____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*From:*ALEJANDRO=
 AGUADO MARTIN<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=3D"m=
ailto:alejandro.aguadomartin..ext@telefonica.com" target=3D"_blank">alejand=
ro.aguadomartin..ext@telefonica.com</a> <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:alejandro.aguadomartin..ext@t=
elefonica.com" target=3D"_blank">alejandro.aguadomartin..ext@telefonica.com=
</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:alejandro.a=
guadomartin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin..=
ext@telefonica.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_blank">a=
lejandro.aguadomartin.ext@telefonica.com</a><br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:alejandro.a=
guadomartin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin..=
ext@telefonica.com</a>&gt;&gt;&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*Sent:* Montag, =
15. April 2019 17:27<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*To:* Diego R. L=
opez &lt;<a href=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_blank">=
diego.r.lopez@telefonica.com</a> <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:diego.r.lopez@telefonica.com"=
 target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:diego.r.lop=
ez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<b=
r>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@=
telefonica.com</a><br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:diego.r.lop=
ez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;&g=
t;&gt;; Carlos Pignataro (cpignata)<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=3D"m=
ailto:cpignata@cisco.com" target=3D"_blank">cpignata@cisco.com</a> &lt;mail=
to:<a href=3D"mailto:cpignata@cisco.com" target=3D"_blank">cpignata@cisco.c=
om</a>&gt; <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:cpignata@cisco.com" target=3D=
"_blank">cpignata@cisco.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:cpignata@ci=
sco.com" target=3D"_blank">cpignata@cisco.com</a> &lt;mailto:<a href=3D"mai=
lto:cpignata@cisco." target=3D"_blank">cpignata@cisco.</a>.com&gt;&gt;&gt;;=
 Frank<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0Brockners<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0(fbrockne) &lt;<=
a href=3D"mailto:fbrockne@cisco.com" target=3D"_blank">fbrockne@cisco.com</=
a> &lt;mailto:<a href=3D"mailto:fbrockne@cisco.com" target=3D"_blank">fbroc=
kne@cisco.com</a>&gt; <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:fbrockne@cisco.com" target=3D=
"_blank">fbrockne@cisco.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:fbrockne@ci=
sco.com" target=3D"_blank">fbrockne@cisco.com</a> &lt;mailto:<a href=3D"mai=
lto:fbrockne@cisco.com" target=3D"_blank">fbrockne@cisco.com</a>&gt;&gt;&gt=
;; Shwetha<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Bhandari (shweth=
ab) &lt;<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@ci=
sco.com</a> <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:shwethab@cisco.com" target=3D=
"_blank">shwethab@cisco.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:shwethab@ci=
sco.com" target=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com</a> &=
lt;mailto:<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@=
cisco.com</a>&gt;&gt;&gt;;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0Tal Mizrahi &lt;<a href=3D"mailto:tal.mi=
zrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a> <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:tal.mizrahi.phd@gmail.com" ta=
rget=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:tal.mizrahi=
.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:tal.mizrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@g=
mail.com</a><br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:tal.mizrahi=
.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;&gt;&gt;=
<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*Cc:* <a href=3D=
"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a> &lt;=
mailto:<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@f=
i.upm.es</a>&gt; <br>
&gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es" target=
=3D"_blank">a.aguadom@fi.upm.es</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:a.aguadom@f=
i.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a> &lt;mailto:<a href=3D"m=
ailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a>&gt;&gt=
;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*Subject:* PoT r=
eview/comments____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Dear all,____<br=
>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0I gave a quick r=
eview to the PoT document. Some comments:____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0- I read =E2=80=
=9CThe non-constant coefficients are used to <br>
&gt;&gt;&gt;&gt; generate the<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Lagrange Polynom=
ial Constants (LPC).=E2=80=9D As far as I<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0understood, the<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0points assigned =
to each node (Xi) are the ones used for<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0generating<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0the LPCi, aren=
=E2=80=99t they?____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*/=E2=80=A6FB: G=
ood catch. The LPCs are of course computed using (x_i,<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0y_i)./*____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0- If we go for i=
ncluding the YANG in the current document<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0(which I<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0agree), paramete=
rs should be described before the yang<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0definition,<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0and maybe it wou=
ld be helpful to have the yang tree (see the<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0current<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0version attached=
).____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*/=E2=80=A6FB: T=
hanks. IMHO it makes sense to keep the YANG model <br>
&gt;&gt;&gt;&gt; in the<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0current doc, giv=
en that the model and the description go <br>
&gt;&gt;&gt;&gt; hand in<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0hand. We can of =
course also include the yang tree to make<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0reading<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0easier. This is =
consistent with other documents which<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0specify YANG<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0models./*____<br=
>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0- I include in t=
he attached file few questions about naming<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0of some<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0parameters.____<=
br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*//*____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*/=E2=80=A6FB:<b=
r>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0- naming F_i(x_i=
, y_i) =E2=80=93 I agree that a better name could be<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0used.<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0The only potenti=
al concern would be that the open source<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0implementation i=
n OpenDaylight uses this naming =E2=80=93 changing<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0it might<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0lead to confusio=
n.. We can start with adding a comment to make<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0things clearer./=
*____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*//*____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*/- secret key =
=E2=80=93 this is the constant part of the first<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0polynomial<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0which serves as =
the secret =E2=80=93 and which is re-retrieved.<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0Again, we<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0can update the d=
escription to make things clearer./*____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*//*____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*/- size of the =
random number: This is unrelated to OPOT.<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0The random<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0number is to uni=
quely identify a packet. There is a trade-off<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0between the size=
 of the random number and how often you need to<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0re-key your syst=
em. At high speeds, the random number =E2=80=93 which<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0identifies a par=
ticular packet =E2=80=93 is used up quite quickly if<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0it is<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0only 32-bit wide=
. See section 4<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt; <br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0/*<a href=3D"htt=
ps://tools.ietf.org/html/draft-ietf-sfc-proof-of-transit-02#section-4____" =
rel=3D"noreferrer" target=3D"_blank">https://tools.ietf.org/html/draft-ietf=
-sfc-proof-of-transit-02#section-4____</a><br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*//*____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*/- number of pr=
ofiles: For a deployment which is expected<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0to renew<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0keys every now a=
nd then (e.g. you run with 32-bit random<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0numbers at<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0reasonably high =
speeds), you need at least 2 profiles =E2=80=93 an<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0active<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0one and one that=
 you can activate once you run out of random<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0numbers<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0(which is what t=
he encapsulating node would decide).. /*____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0- I have checked=
 some of the existing YANG files within the<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0IETF to<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0see in which it =
would be helpful to include. From the (not<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0so) old<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0OpenFlow, I assu=
me that one match is necessary (for <br>
&gt;&gt;&gt;&gt; identify the<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0iOAM/PoT header)=
 whilst the source node can use any existing<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0match<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0field to identif=
y packets where to apply the PoT scheme. In<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0terms of<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0actions, I would=
 say that two may be required: for any node, an<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0update-pot is ne=
cessary, while the verifier would need a<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0verify-pot<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0type of action, =
that would ideally either remove the header<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0or drop<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0the packet if fa=
ils (I do not know if you are thinking in more<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0complex scenario=
s).____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*//*____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*/=E2=80=A6FB: F=
rom an OF perspective, that sounds feasible.. That<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0said, we<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0probably want to=
 avoid making the spec specific to a<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0technology like<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0OF, hence would =
suggest that we don=E2=80=99t specify such a <br>
&gt;&gt;&gt;&gt; behavior as<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0part of this doc=
ument./*____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*//*____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0- For this last =
point, I have seen the definitions within<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0draft-asechoud-r=
tgwg-qos-model-08, where matched could map<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0(if I am<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0not wrong) to cl=
assifiers/filters, and actions to actions. I<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0send<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0you the models i=
n a zip file. In this sense the model to be<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0defined<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0in the PoT shall=
 be an augment of the models defined in that<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0document. I have=
 not done a very deep revision on the model,<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0but I<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0think it could f=
it there. If you have check this or other<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0models,<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0let me know so I=
 could also help.____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*//*____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*/=E2=80=A6FB: P=
er my note above: In order to keep POT generic and<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0not link<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0it to a particul=
ar classification mechanism, I=E2=80=99d prefer to<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0keep the<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0classification q=
uestion as out of scope for the current<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0document.<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0That way it can =
also apply to technologies which come with<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0their own<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0way to classify =
=E2=80=93 and which might fully decouple the tunneling<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0aspects from the=
 classification aspects. /*____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Thanks a lot and=
 sorry for such long email.____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*/..FB: Thanks a=
gain for all your comments. We=E2=80=99ll get them<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0included<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0in the next revi=
sion. /*____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*//*____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0*/Cheers, Frank/=
*____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Best,____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Alejandro____<br=
>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt; <br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0----------------=
--------------------------------------------------------<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Este mensaje y s=
us adjuntos se dirigen exclusivamente a su<br>
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ede contener informaci=C3=B3n privilegiada o<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0confidencial<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0y es para uso ex=
clusivo de la persona o entidad de destino.<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0Si no es<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0usted. el destin=
atario indicado, queda notificado de que la<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0lectura,<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0utilizaci=C3=B3n=
, divulgaci=C3=B3n y/o copia sin autorizaci=C3=B3n puede estar<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0prohibida en vir=
tud de la legislaci=C3=B3n vigente. Si ha<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0recibido este<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0mensaje por erro=
r, le rogamos que nos lo comunique<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0inmediatamente<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0por esta misma v=
=C3=ADa y proceda a su destrucci=C3=B3n.<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0The information =
contained in this transmission is <br>
&gt;&gt;&gt;&gt; privileged and<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0confidential inf=
ormation intended only for the use of the<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0individual<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0or entity named =
above. If the reader of this message is not the<br>
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nt, you are hereby notified that any<br>
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copying of this communication is strictly<br>
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ou have received this transmission in error,<br>
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mmunication in error and then delete it.<br>
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&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0Esta mensagem e =
seus anexos se dirigem exclusivamente ao seu<br>
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o, pode conter informa=C3=A7=C3=A3o privilegiada ou<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0confidencial e<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0=C3=A9 para uso =
exclusivo da pessoa ou entidade de destino. Se n=C3=A3o =C3=A9<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0vossa senhoria o=
 destinat=C3=A1rio indicado, fica notificado de <br>
&gt;&gt;&gt;&gt; que a<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0leitura, utiliza=
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=A3o pode<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0estar proibida e=
m virtude da legisla=C3=A7=C3=A3o vigente. Se recebeu <br>
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o, rogamos-lhe que nos o comunique<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0imediatamente por<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0esta mesma via e=
 proceda a sua destrui=C3=A7=C3=A3o____<br>
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&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;=C2=A0 =C2=A0 =C2=A0________________=
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get=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a href=3D"mailto:sfc@ietf.org" =
target=3D"_blank">sfc@ietf.org</a>&gt; &lt;mailto:<a href=3D"mailto:sfc@iet=
f.org" target=3D"_blank">sfc@ietf.org</a>&gt; <br>
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k">sfc@ietf.org</a><br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&lt;mailto:<a href=3D"mailto:sfc@ietf.or=
g" target=3D"_blank">sfc@ietf.org</a>&gt;&gt;<br>
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&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt; ___________________________________=
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target=3D"_blank">sfc@ietf.org</a>&gt; &lt;mailto:<a href=3D"mailto:sfc@iet=
f.org" target=3D"_blank">sfc@ietf.org</a>&gt;<br>
&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt; <a href=3D"https://www.ietf.org/mai=
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&gt;&gt;&gt;&gt; =C2=A0=C2=A0=C2=A0&gt;<br>
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&gt;&gt;&gt;&gt; _______________________________________________<br>
&gt;&gt;&gt;&gt; sfc mailing list<br>
&gt;&gt;&gt;&gt; <a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf=
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etf.org</a>&gt; &lt;mailto:<a href=3D"mailto:sfc@ietf.org" target=3D"_blank=
">sfc@ietf.org</a>&gt;<br>
&gt;&gt;&gt;&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/sfc" rel=
=3D"noreferrer" target=3D"_blank">https://www.ietf.org/mailman/listinfo/sfc=
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&gt; <br>
<br>
_______________________________________________<br>
sfc mailing list<br>
<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/sfc" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/listinfo/sfc</a><br>
</blockquote></div></div>

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From: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
To: Greg Mirsky <gregimirsky@gmail.com>
CC: "Joel M. Halpern" <jmh@joelhalpern.com>, "sfc@ietf.org" <sfc@ietf.org>
Thread-Topic: [sfc] draft-ietf-sfc-proof-of-transit-04 ready for WGLC? (was RE: PoT review/comments)
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Date: Wed, 1 Apr 2020 19:16:48 +0000
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To: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
Cc: "sfc@ietf.org" <sfc@ietf.org>
References: <BYAPR11MB258493B474F6CC611E0F31FADAF40@BYAPR11MB2584.namprd11.prod.outlook.com> <CA+RyBmWaaPzdjaW-fxN_xgy7TwUpnVKw5ruRU9=+kdwHuwvn9g@mail.gmail.com> <591ec0a6-3416-843e-59f3-b44466e76a33@joelhalpern.com> <CA+RyBmVNB8b7JqqY9P7er3TP25uDw5ex-Ui7o8_8CPpAkc38DA@mail.gmail.com> <D6026A34-2F6D-4B5C-8277-1223043E136D@cisco.com> <2239931e-b1e5-9884-04cc-4433ff1dfd75@joelhalpern.com> <407B4089-A34D-4F98-B443-98883F45BF94@cisco.com> <67d832d3-88f2-7239-2b08-7ccac547fffa@joelhalpern.com> <CA+RyBmXNx_bKnFhHgwbgC7k46Yb6PF7qpxGr5onByOki1Ctztw@mail.gmail.com> <936C1794-3D30-428F-AFDE-FE3ED75434C2@cisco.com>
From: "Joel M. Halpern" <jmh@joelhalpern.com>
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Subject: Re: [sfc] draft-ietf-sfc-proof-of-transit-04 ready for WGLC? (was RE: PoT review/comments)
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To be clear up front, I can live with an informative reference from 
sfc-proof-of-transit to sfc-ioam-nsh.

However, it seems to me that as a Proposed Standard, we are expected to 
define an interoperable and implementable protocol.  Without a normative 
reference to some encoding (and sfc-ioam-nsh does seem the obvious one 
to reference) we do not seem to have a full PS.  That is not to say that 
there can not be other encodings.  But NSH is the SFC agreed header 
format.  So for an SFC document, this seems natural as the MTI.

Yours,
Joel

On 4/1/2020 3:16 PM, Carlos Pignataro (cpignata) wrote:
> Dear Greg,
> 
>> 2020/04/01 午後2:59、Greg Mirsky <gregimirsky@gmail.com>のメール:
>>
>> Dear All,
>> I agree with Joel that the reference in draft-ietf-sfc-proof-of-transit to draft-ietf-ippm-ioam-data should be normative.
> 
> Great. Everyone seems to be aligned on this point.
> 
> 
>> I also support the proposal to add in draft-ietf-sfc-proof-of-transit a normative reference to draft-ietf-sfc-ioam-nsh. SFC WG is working on defining SFC that is based on NSH (SFC NSH), and while SFC might be realized using other techniques, draft-ietf-sfc-ioam-nsh is, and likely will remain, the only document that is describing iOAM encapsulation in SFC NSH. Thus, I believe, for SFC WG, implementation of PoT based on iOAM requires implementation of iOAM encapsulation in SFC NSH, as defined in draft-ietf-sfc-ioam-nsh. Hence, the reference must be normative.
> 
> 
> This logic is flawed in the onset. The main point is that POT can be realized with a variety of transports and technologies and use-cases, one of which is SFC, and then further within SFC one of which is NSH.
> 
> You seem to argue that NSH is somehow in practice the only SFC realization, and because of that the reference “must be normative”.
> 
> I disagree with the premise, but regardless, it does not matter since POT applies to other non-SFC(-non-NSH) technologies. Therefore that since-then logic does not apply.
> 
> Copying the very first sentence of the Abstract:
> 
>     Several technologies such as Traffic Engineering (TE), Service
>     Function Chaining (SFC), and policy based routing [...]
> 
> 
> And now looking at this fragment, I am more convinced that this is one example and as such Informative.
> 
> I would not object to Normative for the right reasons, but the reason above, in my mind, does not follow.
> 
> Thanks,
> 
> Carlos.
> 
> 
>>
>> Regards,
>> Greg
>>
>> On Tue, Mar 24, 2020 at 2:25 PM Joel M. Halpern <jmh@joelhalpern.com> wrote:
>> I think we all agree that draft-ietf-sfc-proof-of-transit requires the
>> normative reference to draft-ietf-ippm-ioam-data.
>>
>> Regarding a reference from draft-ietf-sfc-proof-of-transit to
>> draft-ietf-sfc-ioam-nsh, I think we agree that it is needed.  The
>> question then is normative or informative.  If we use the usual IETF
>> rule that there has to be a defined normative way to interoperably
>> implement a protocol spec (with other options allowed), my inclination
>> is that the reference should be normative.
>>
>> Regarding the informative reference in the other direction from
>> draft-ietf-sfc-ioam-nsh to draft-ietf-sfc-proof-of-transit, while I
>> personally like the idea, that is up to you / the working group.
>>
>> Yours,
>> Joel
>>
>> On 3/24/2020 5:20 PM, Carlos Pignataro (cpignata) wrote:
>>> Hi, Joel,
>>>
>>> The way in which the doc hierarchy and relationship is structure seems
>>> to support and potentially even require:
>>>
>>>  From draft-ietf-sfc-proof-of-transit:
>>> * A normative reference to [I-D.ietf-ippm-ioam-data], since PoT gives
>>> over IOAM explicitly, and that exists.
>>> * Optionally, an Informative reference to draft-ietf-sfc-ioam-nsh, since
>>> that’s really one out of many ways to carry IOAM over NSH, but separated
>>> by document indirection. This does not exist but can be added.
>>>
>>>   From draft-ietf-sfc-ioam-nsh:
>>> * Optionally, an Informative reference to
>>> draft-ietf-sfc-proof-of-transit, since that’s one out of many
>>> applications. This does not exist but can be added.
>>>
>>> Thoughts?
>>>
>>> Best,
>>>
>>> Carlos.
>>>
>>>> 2020/03/24 午後5:10、Joel M. Halpern <jmh@joelhalpern.com
>>>> <mailto:jmh@joelhalpern.com>>のメール:
>>>>
>>>> Carlos, it sounds like there should probably be a normative reference
>>>> from draft-ietf-sfc-proof of transit to draft-ietf-sfc-ioam-nsh?
>>>> Possibly in the same sentence that refers to draft-ietf-ippm-ioam-data?
>>>>
>>>> Yours,
>>>> Joel
>>>>
>>>> On 3/24/2020 4:54 PM, Carlos Pignataro (cpignata) wrote:
>>>>> Greg,
>>>>> The very first sentence of the PoT document reads:
>>>>>     Several technologies such as Traffic Engineering (TE), Service
>>>>>     Function Chaining (SFC), and policy based routing are used to steer
>>>>>     traffic through a specific, user-defined path.  This document defines
>>>>> Explaining how this document is applicable to various
>>>>> traffic-steering technologies.
>>>>> Section 3 then explains:
>>>>>     The POT information is encapsulated in packets as an IOAM Proof Of
>>>>>     Transit Option.  The details and format of the encapsulation and the
>>>>>     POT Option format are specified in [I-D.ietf-ippm-ioam-data].
>>>>> Which shows how to carry PoT in IOAM, with an appropriate pointer.
>>>>> Lastly, draft-ietf-sfc-ioam-nsh-03 defines IOAM over an NSH
>>>>> encapsulation.
>>>>> This arrangements maximizes specification modularity and
>>>>> portability/reusability.
>>>>> Best,
>>>>> Carlos.
>>>>>> 2020/03/24 午後4:48、Greg Mirsky <gregimirsky@gmail.com
>>>>>> <mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com>>のメール:
>>>>>>
>>>>>> Hi Joel,
>>>>>> thank you for the most expedient response. As I understand it, iOAM
>>>>>> Data draft describes the format of the informational element that
>>>>>> carries POT-related information but it does not define how the
>>>>>> element to be carried in case of NSH encapsulation. And that is what
>>>>>> I was asking, apologies for not being clear in my first note.
>>>>>>
>>>>>> Regards,
>>>>>> Greg
>>>>>>
>>>>>> On Tue, Mar 24, 2020 at 1:42 PM Joel M.. Halpern
>>>>>> <jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>
>>>>>> <mailto:jmh@joelhalpern.com>> wrote:
>>>>>>
>>>>>>     Regarding the information carriage, the PoT document points to the
>>>>>>     IOAM
>>>>>>     document.
>>>>>> https://tools.ietf.org/html/draft-ietf-ippm-ioam-data-08#section-4.5
>>>>>>     gives the format (and ways to have other formats if needed.)
>>>>>>
>>>>>>     Yours,
>>>>>>     Joel
>>>>>>
>>>>>>     On 3/24/2020 4:26 PM, Greg Mirsky wrote:
>>>>>>     > Hi Frank,
>>>>>>     > thank you for reminding us about this important work, indeed we
>>>>>>     should
>>>>>>     > complete it. I've reviewed the draft and have several questions.
>>>>>>     Please
>>>>>>     > kindly consider:
>>>>>>     >
>>>>>>     >   * I couldn't find information where, relative to NSH, RND and
>>>>>>     CML are
>>>>>>     >     transported
>>>>>>     >   * for YANG data models using "reference" is strongly
>>>>>>     encouraged as it
>>>>>>     >     provides a pointer to the specification. Since the POT data
>>>>>>     model is
>>>>>>     >     in the same document as the POT specification, listing the
>>>>>>     >     appropriate section should suffice
>>>>>>     >
>>>>>>     > Regards,
>>>>>>     > Greg
>>>>>>     >
>>>>>>     > On Thu, Mar 19, 2020 at 6:45 AM Frank Brockners (fbrockne)
>>>>>>     > <fbrockne=40cisco.com@dmarc.ietf.org
>>>>>> <mailto:fbrockne=40cisco.com@dmarc.ietf.org>
>>>>>>     <mailto:40cisco.com@dmarc.ietf.org>
>>>>>>     > <mailto:40cisco.com@dmarc.ietf.org
>>>>>>     <mailto:40cisco.com@dmarc.ietf.org>>> wrote:
>>>>>>     >
>>>>>>     >     Dear SFC WG,____
>>>>>>     >
>>>>>>     >     __ __
>>>>>>     >
>>>>>>     >     It’s been a while since we posted
>>>>>>     draft-ietf-sfc-proof-of-transit-04
>>>>>>     >     which addressed all known comments – see below.
>>>>>>     >     I’ve not seen any more recent comments or questions come up
>>>>>>     – and
>>>>>>     >     we’ve been through quite a few discussions and reviews of this
>>>>>>     >     document already.____
>>>>>>     >
>>>>>>     >     __ __
>>>>>>     >
>>>>>>     >     Thus the question: Are we ready for WG LC?____
>>>>>>     >
>>>>>>     >     __ __
>>>>>>     >
>>>>>>     >     Thanks, Frank____
>>>>>>     >
>>>>>>     >     __ __
>>>>>>     >
>>>>>>     >     *From:* Frank Brockners (fbrockne)
>>>>>>     >     *Sent:* Donnerstag, 21. November 2019 08:21
>>>>>>     >     *To:* Alejandro Aguado FI <a.aguadom@fi.upm.es
>>>>>> <mailto:a.aguadom@fi.upm.es>
>>>>>>     <mailto:a.aguadom@fi.upm.es>
>>>>>>     >     <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>>;
>>>>>>     Diego R. Lopez
>>>>>>     >     <diego.r.lopez@telefonica.com
>>>>>> <mailto:diego.r.lopez@telefonica.com>
>>>>>>     <mailto:diego.r.lopez@telefonica.com>
>>>>>>     >     <mailto:diego.r.lopez@telefonica.com
>>>>>>     <mailto:diego.r.lopez@telefonica.com>>>; Carlos Pignataro (cpignata)
>>>>>>     >     <cpignata@cisco.com <mailto:cpignata@cisco.com>
>>>>>> <mailto:cpignata@cisco.com>
>>>>>>     <mailto:cpignata@cisco.com <mailto:cpignata@cisco..com>>>;
>>>>>>     ALEJANDRO AGUADO
>>>>>>     >     MARTIN <alejandro.aguadomartin.ext@telefonica.com
>>>>>> <mailto:alejandro.aguadomartin.ext@telefonica.com>
>>>>>>     <mailto:alejandro.aguadomartin..ext@telefonica.com>
>>>>>>     >     <mailto:alejandro.aguadomartin.ext@telefonica.com
>>>>>>     <mailto:alejandro.aguadomartin..ext@telefonica.com>>>; Shwetha
>>>>>>     >     Bhandari (shwethab) <shwethab@cisco.com
>>>>>> <mailto:shwethab@cisco.com>
>>>>>>     <mailto:shwethab@cisco.com>
>>>>>>     >     <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com>>>;
>>>>>>     Tal Mizrahi <tal.mizrahi.phd@gmail.com
>>>>>> <mailto:tal.mizrahi.phd@gmail.com>
>>>>>>     <mailto:tal.mizrahi.phd@gmail.com>
>>>>>>     >     <mailto:tal.mizrahi.phd@gmail.com
>>>>>>     <mailto:tal.mizrahi.phd@gmail.com>>>
>>>>>>     >     *Cc:* sfc@ietf.org <mailto:sfc@ietf.org> <mailto:sfc@ietf.org>
>>>>>>     <mailto:sfc@ietf.org <mailto:sfc@ietf.org>>
>>>>>>     >     *Subject:* RE: PoT review/comments____
>>>>>>     >
>>>>>>     >     __ __
>>>>>>     >
>>>>>>     >     We’ve just posted revision -04 of
>>>>>>     draft-ietf-sfc-proof-of-transit
>>>>>>     >     which now includes support for OPOT configuration in the
>>>>>>     yang model;____
>>>>>>     >
>>>>>>     >     see section 5.2.3 in
>>>>>>     > https://www.ietf.org/id/draft-ietf-sfc-proof-of-transit-04.txt.
>>>>>> ____
>>>>>>     >
>>>>>>     >     The main addition is a grouping opot-profile, which adds
>>>>>>     upstream
>>>>>>     >     and downstream masks that OPOT requires.____
>>>>>>     >
>>>>>>     >     Thanks to Alejandro for suggesting these updates.____
>>>>>>     >
>>>>>>     >     __ __
>>>>>>     >
>>>>>>     >     This fixes the last “known issue” in
>>>>>>     >     draft-ietf-sfc-proof-of-transit. It would be great if you
>>>>>>     could give
>>>>>>     >     the document another careful read through.
>>>>>>     >     Are we ready for WGLC?____
>>>>>>     >
>>>>>>     >     __ __
>>>>>>     >
>>>>>>     >     Thanks, Frank____
>>>>>>     >
>>>>>>     >     __ __
>>>>>>     >
>>>>>>     >     __ __
>>>>>>     >
>>>>>>     >     *From:* Alejandro Aguado FI <a.aguadom@fi.upm.es
>>>>>> <mailto:a.aguadom@fi.upm.es>
>>>>>>     <mailto:a..aguadom@fi.upm.es>
>>>>>>     >     <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>>
>>>>>>     >     *Sent:* Donnerstag, 12. September 2019 15:40
>>>>>>     >     *To:* Diego R. Lopez <diego.r.lopez@telefonica.com
>>>>>> <mailto:diego.r.lopez@telefonica.com>
>>>>>>     <mailto:diego.r.lopez@telefonica.com>
>>>>>>     >     <mailto:diego.r.lopez@telefonica.com
>>>>>>     <mailto:diego.r.lopez@telefonica.com>>>; Carlos Pignataro (cpignata)
>>>>>>     >     <cpignata@cisco.com <mailto:cpignata@cisco.com>
>>>>>> <mailto:cpignata@cisco.com>
>>>>>>     <mailto:cpignata@cisco.com <mailto:cpignata@cisco..com>>>; Frank
>>>>>>     Brockners
>>>>>>     >     (fbrockne) <fbrockne@cisco.com <mailto:fbrockne@cisco.com>
>>>>>> <mailto:fbrockne@cisco.com>
>>>>>>     <mailto:fbrockne@cisco.com <mailto:fbrockne@cisco.com>>>;
>>>>>>     >     ALEJANDRO AGUADO MARTIN
>>>>>>     <alejandro.aguadomartin.ext@telefonica.com
>>>>>> <mailto:alejandro.aguadomartin.ext@telefonica.com>
>>>>>>     <mailto:alejandro.aguadomartin.ext@telefonica.com>
>>>>>>     >     <mailto:alejandro.aguadomartin.ext@telefonica.com
>>>>>>     <mailto:alejandro.aguadomartin..ext@telefonica.com>>>; Shwetha
>>>>>>     >     Bhandari (shwethab) <shwethab@cisco.com
>>>>>> <mailto:shwethab@cisco.com>
>>>>>>     <mailto:shwethab@cisco.com>
>>>>>>     >     <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com>>>;
>>>>>>     Tal Mizrahi <tal.mizrahi.phd@gmail.com
>>>>>> <mailto:tal.mizrahi.phd@gmail.com>
>>>>>>     <mailto:tal.mizrahi.phd@gmail.com>
>>>>>>     >     <mailto:tal.mizrahi.phd@gmail.com
>>>>>>     <mailto:tal.mizrahi.phd@gmail.com>>>
>>>>>>     >     *Cc:* sfc@ietf.org <mailto:sfc@ietf.org> <mailto:sfc@ietf.org>
>>>>>>     <mailto:sfc@ietf.org <mailto:sfc@ietf.org>>
>>>>>>     >     *Subject:* Re: PoT review/comments____
>>>>>>     >
>>>>>>     >     __ __
>>>>>>     >
>>>>>>     >     Hi Shwetha,____
>>>>>>     >
>>>>>>     >     __ __
>>>>>>     >
>>>>>>     >     Yes, I think it is a good idea. From your points, the second
>>>>>>     one is
>>>>>>     >     a bit confusing to me... But I do not fully remember how the
>>>>>>     model
>>>>>>     >     was structured, so I need to revise the document.____
>>>>>>     >
>>>>>>     >     __ __
>>>>>>     >
>>>>>>     >     Give me a day or two to explore again the model, and either we
>>>>>>     >     exchange few emails with proposals for the extension, or we can
>>>>>>     >     organise a quick call during next week to close a final
>>>>>>     proposal to
>>>>>>     >     share with other contributors.____
>>>>>>     >
>>>>>>     >     __ __
>>>>>>     >
>>>>>>     >     Thanks!____
>>>>>>     >
>>>>>>     >     __ __
>>>>>>     >
>>>>>>     >     Best,____
>>>>>>     >
>>>>>>     >     Alejandro____
>>>>>>     >
>>>>>>     >     __ __
>>>>>>     >
>>>>>>     >     __ __
>>>>>>     >
>>>>>>     >     El 12 de septiembre de 2019 a las 8:52:44, Shwetha Bhandari
>>>>>>     >     (shwethab) (shwethab@cisco.com <mailto:shwethab@cisco.com>
>>>>>> <mailto:shwethab@cisco.com>
>>>>>>     <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com>>)
>>>>>>     >     escribió:____
>>>>>>     >
>>>>>>     >     Hi Alejandro, Diego,____
>>>>>>     >
>>>>>>     >     ____
>>>>>>     >
>>>>>>     >     Since you added extension to do OPoT, should we extend the
>>>>>>     model in
>>>>>>     >     draft-ietf-sfc-proof-of-transit to enable OPoT and any
>>>>>>     parameters
>>>>>>     >     required for it  shared masks per link. If yes my proposal
>>>>>>     will be
>>>>>>     >     to:____
>>>>>>     >
>>>>>>     >      1. Augment existing pot-profile with fields to Enable OPoT
>>>>>>     and a
>>>>>>     >         cipher scheme if needed.____
>>>>>>     >      2. Separate container in the model to define a map of (Node
>>>>>>     >         link/interface, mask) to distribute pair wise masks. For
>>>>>>     e.g.
>>>>>>     >         Node link/interface identifier can be UUID as defined in
>>>>>>     rfc8348
>>>>>>     >         Or____
>>>>>>     >      3. Masks can be part of pot-profile.____
>>>>>>     >
>>>>>>     >     ____
>>>>>>     >
>>>>>>     >     What do you think about revising the model with this?____
>>>>>>     >
>>>>>>     >     ____
>>>>>>     >
>>>>>>     >     Thanks,____
>>>>>>     >
>>>>>>     >     Shwetha____
>>>>>>     >
>>>>>>     >     ____
>>>>>>     >
>>>>>>     >     *From: *"Frank Brockners (fbrockne)" <fbrockne@cisco.com
>>>>>> <mailto:fbrockne@cisco.com>
>>>>>>     <mailto:fbrockne@cisco.com>
>>>>>>     >     <mailto:fbrockne@cisco.com <mailto:fbrockne@cisco.com>>>
>>>>>>     >     *Date: *Wednesday, September 11, 2019 at 2:34 PM
>>>>>>     >     *To: *ALEJANDRO AGUADO MARTIN
>>>>>>     >     <alejandro.aguadomartin.ext@telefonica.com
>>>>>> <mailto:alejandro.aguadomartin.ext@telefonica.com>
>>>>>>     <mailto:alejandro.aguadomartin.ext@telefonica.com>
>>>>>>     >     <mailto:alejandro.aguadomartin.ext@telefonica.com
>>>>>>     <mailto:alejandro.aguadomartin..ext@telefonica.com>>>, "Diego R.
>>>>>>     >     Lopez" <diego.r.lopez@telefonica.com
>>>>>> <mailto:diego.r.lopez@telefonica.com>
>>>>>>     <mailto:diego.r.lopez@telefonica.com>
>>>>>>     >     <mailto:diego.r..lopez@telefonica.com
>>>>>>     <mailto:diego.r..lopez@telefonica.com>>>, Carlos Pignataro
>>>>>>     >     <cpignata@cisco..com <mailto:cpignata@cisco.com
>>>>>>     <mailto:cpignata@cisco.com>>>, Shwetha bhandari
>>>>>>     >     <shwethab@cisco.com <mailto:shwethab@cisco.com>
>>>>>> <mailto:shwethab@cisco.com>
>>>>>>     <mailto:shwethab@cisco.com <mailto:shwethab@cisco..com>>>, Tal
>>>>>> Mizrahi
>>>>>>     >     <tal.mizrahi.phd@gmail.com <mailto:tal.mizrahi.phd@gmail.com>
>>>>>>     <mailto:tal.mizrahi.phd@gmail.com>
>>>>>>     <mailto:tal.mizrahi.phd@gmail.com
>>>>>> <mailto:tal.mizrahi.phd@gmail.com>>>
>>>>>>     >     *Cc: *"a..aguadom@fi.upm.es <mailto:a..aguadom@fi.upm.es>
>>>>>> <mailto:a..aguadom@fi.upm.es>
>>>>>>     <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>"
>>>>>>     >     <a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>
>>>>>> <mailto:a.aguadom@fi.upm.es>
>>>>>>     <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>>,
>>>>>>     "sfc@ietf.org <mailto:sfc@ietf.org> <mailto:sfc@ietf.org>
>>>>>>     >     <mailto:sfc@ietf.org <mailto:sfc@ietf.org>>" <sfc@ietf.org
>>>>>> <mailto:sfc@ietf.org>
>>>>>>     <mailto:sfc@ietf.org> <mailto:sfc@ietf.org <mailto:sfc@ietf.org>>>
>>>>>>     >     *Subject: *RE: PoT review/comments____
>>>>>>     >
>>>>>>     >     ____
>>>>>>     >
>>>>>>     >     Hi Alejandro,____
>>>>>>     >
>>>>>>     >     ____
>>>>>>     >
>>>>>>     >     Thanks again for the review. Your comments have been
>>>>>>     integrated into
>>>>>>     >     draft-ietf-sfc-proof-of-transit-03 which just got posted.____
>>>>>>     >
>>>>>>     >     ____
>>>>>>     >
>>>>>>     >     Cheers, Frank____
>>>>>>     >
>>>>>>     >     ____
>>>>>>     >
>>>>>>     >     *From:*Frank Brockners (fbrockne)
>>>>>>     >     *Sent:* Montag, 27. Mai 2019 18:18
>>>>>>     >     *To:* ALEJANDRO AGUADO MARTIN
>>>>>>     >     <alejandro.aguadomartin.ext@telefonica.com
>>>>>> <mailto:alejandro.aguadomartin.ext@telefonica.com>
>>>>>>     <mailto:alejandro.aguadomartin.ext@telefonica.com>
>>>>>>     >     <mailto:alejandro.aguadomartin.ext@telefonica.com
>>>>>>     <mailto:alejandro.aguadomartin..ext@telefonica.com>>>; Diego R. Lopez
>>>>>>     >     <diego.r.lopez@telefonica.com
>>>>>> <mailto:diego.r.lopez@telefonica.com>
>>>>>>     <mailto:diego.r.lopez@telefonica.com>
>>>>>>     >     <mailto:diego.r.lopez@telefonica.com
>>>>>>     <mailto:diego.r.lopez@telefonica.com>>>; Carlos Pignataro (cpignata)
>>>>>>     >     <cpignata@cisco.com <mailto:cpignata@cisco.com>
>>>>>> <mailto:cpignata@cisco.com>
>>>>>>     <mailto:cpignata@cisco.com <mailto:cpignata@cisco..com>>>; Shwetha
>>>>>>     Bhandari
>>>>>>     >     (shwethab) <shwethab@cisco.com <mailto:shwethab@cisco.com>
>>>>>> <mailto:shwethab@cisco.com>
>>>>>>     <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com>>>; Tal
>>>>>>     >     Mizrahi <tal.mizrahi.phd@gmail.com
>>>>>> <mailto:tal.mizrahi.phd@gmail.com>
>>>>>>     <mailto:tal.mizrahi.phd@gmail..com>
>>>>>>     <mailto:tal.mizrahi.phd@gmail.com
>>>>>> <mailto:tal.mizrahi.phd@gmail.com>>>
>>>>>>     >     *Cc:* a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>
>>>>>> <mailto:a.aguadom@fi.upm.es>
>>>>>>     <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>;
>>>>>> sfc@ietf.org <mailto:sfc@ietf.org> <mailto:sfc@ietf.org>
>>>>>>     >     <mailto:sfc@ietf.org <mailto:sfc@ietf.org>>
>>>>>>     >     *Subject:* RE: PoT review/comments____
>>>>>>     >
>>>>>>     >     ____
>>>>>>     >
>>>>>>     >     Hi Alejandro,____
>>>>>>     >
>>>>>>     >     ____
>>>>>>     >
>>>>>>     >     Many thanks for the comments – and sorry for the delay –
>>>>>>     >     unfortunately your email somehow got dropped from my todo list.
>>>>>>     >     Please see inline…____
>>>>>>     >
>>>>>>     >     ____
>>>>>>     >
>>>>>>     >     (cc’ing the list as well).____
>>>>>>     >
>>>>>>     >     ____
>>>>>>     >
>>>>>>     >     *From:*ALEJANDRO AGUADO MARTIN
>>>>>>     >     <alejandro.aguadomartin..ext@telefonica.com
>>>>>> <mailto:alejandro.aguadomartin..ext@telefonica.com>
>>>>>>     <mailto:alejandro.aguadomartin..ext@telefonica.com>
>>>>>>     >     <mailto:alejandro.aguadomartin.ext@telefonica.com
>>>>>>     <mailto:alejandro.aguadomartin..ext@telefonica.com>>>
>>>>>>     >     *Sent:* Montag, 15. April 2019 17:27
>>>>>>     >     *To:* Diego R. Lopez <diego.r.lopez@telefonica.com
>>>>>> <mailto:diego.r.lopez@telefonica.com>
>>>>>>     <mailto:diego.r.lopez@telefonica.com>
>>>>>>     >     <mailto:diego.r.lopez@telefonica.com
>>>>>>     <mailto:diego.r.lopez@telefonica.com>>>; Carlos Pignataro (cpignata)
>>>>>>     >     <cpignata@cisco.com <mailto:cpignata@cisco.com>
>>>>>> <mailto:cpignata@cisco.com>
>>>>>>     <mailto:cpignata@cisco.com <mailto:cpignata@cisco..com>>>; Frank
>>>>>>     Brockners
>>>>>>     >     (fbrockne) <fbrockne@cisco.com <mailto:fbrockne@cisco.com>
>>>>>> <mailto:fbrockne@cisco.com>
>>>>>>     <mailto:fbrockne@cisco.com <mailto:fbrockne@cisco.com>>>; Shwetha
>>>>>>     >     Bhandari (shwethab) <shwethab@cisco.com
>>>>>> <mailto:shwethab@cisco.com>
>>>>>>     <mailto:shwethab@cisco.com>
>>>>>>     >     <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com>>>;
>>>>>>     Tal Mizrahi <tal.mizrahi.phd@gmail.com
>>>>>> <mailto:tal.mizrahi.phd@gmail.com>
>>>>>>     <mailto:tal.mizrahi.phd@gmail.com>
>>>>>>     >     <mailto:tal.mizrahi.phd@gmail.com
>>>>>>     <mailto:tal.mizrahi.phd@gmail.com>>>
>>>>>>     >     *Cc:* a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>
>>>>>> <mailto:a.aguadom@fi.upm.es>
>>>>>>     <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>
>>>>>>     >     *Subject:* PoT review/comments____
>>>>>>     >
>>>>>>     >     ____
>>>>>>     >
>>>>>>     >     Dear all,____
>>>>>>     >
>>>>>>     >     ____
>>>>>>     >
>>>>>>     >     I gave a quick review to the PoT document. Some comments:____
>>>>>>     >
>>>>>>     >     ____
>>>>>>     >
>>>>>>     >     - I read “The non-constant coefficients are used to
>>>>>> generate the
>>>>>>     >     Lagrange Polynomial Constants (LPC).” As far as I
>>>>>>     understood, the
>>>>>>     >     points assigned to each node (Xi) are the ones used for
>>>>>>     generating
>>>>>>     >     the LPCi, aren’t they?____
>>>>>>     >
>>>>>>     >     */…FB: Good catch. The LPCs are of course computed using (x_i,
>>>>>>     >     y_i)./*____
>>>>>>     >
>>>>>>     >     - If we go for including the YANG in the current document
>>>>>>     (which I
>>>>>>     >     agree), parameters should be described before the yang
>>>>>>     definition,
>>>>>>     >     and maybe it would be helpful to have the yang tree (see the
>>>>>>     current
>>>>>>     >     version attached).____
>>>>>>     >
>>>>>>     >     */…FB: Thanks. IMHO it makes sense to keep the YANG model
>>>>>> in the
>>>>>>     >     current doc, given that the model and the description go
>>>>>> hand in
>>>>>>     >     hand. We can of course also include the yang tree to make
>>>>>>     reading
>>>>>>     >     easier. This is consistent with other documents which
>>>>>>     specify YANG
>>>>>>     >     models./*____
>>>>>>     >
>>>>>>     >     - I include in the attached file few questions about naming
>>>>>>     of some
>>>>>>     >     parameters.____
>>>>>>     >
>>>>>>     >     *//*____
>>>>>>     >
>>>>>>     >     */…FB:
>>>>>>     >     - naming F_i(x_i, y_i) – I agree that a better name could be
>>>>>>     used.
>>>>>>     >     The only potential concern would be that the open source
>>>>>>     >     implementation in OpenDaylight uses this naming – changing
>>>>>>     it might
>>>>>>     >     lead to confusion.. We can start with adding a comment to make
>>>>>>     >     things clearer./*____
>>>>>>     >
>>>>>>     >     *//*____
>>>>>>     >
>>>>>>     >     */- secret key – this is the constant part of the first
>>>>>>     polynomial
>>>>>>     >     which serves as the secret – and which is re-retrieved.
>>>>>>     Again, we
>>>>>>     >     can update the description to make things clearer./*____
>>>>>>     >
>>>>>>     >     *//*____
>>>>>>     >
>>>>>>     >     */- size of the random number: This is unrelated to OPOT.
>>>>>>     The random
>>>>>>     >     number is to uniquely identify a packet. There is a trade-off
>>>>>>     >     between the size of the random number and how often you need to
>>>>>>     >     re-key your system. At high speeds, the random number – which
>>>>>>     >     identifies a particular packet – is used up quite quickly if
>>>>>>     it is
>>>>>>     >     only 32-bit wide. See section 4
>>>>>>     >
>>>>>>         /*https://tools.ietf.org/html/draft-ietf-sfc-proof-of-transit-02#section-4____
>>>>>>     >
>>>>>>     >     *//*____
>>>>>>     >
>>>>>>     >     */- number of profiles: For a deployment which is expected
>>>>>>     to renew
>>>>>>     >     keys every now and then (e.g. you run with 32-bit random
>>>>>>     numbers at
>>>>>>     >     reasonably high speeds), you need at least 2 profiles – an
>>>>>>     active
>>>>>>     >     one and one that you can activate once you run out of random
>>>>>>     numbers
>>>>>>     >     (which is what the encapsulating node would decide).. /*____
>>>>>>     >
>>>>>>     >     - I have checked some of the existing YANG files within the
>>>>>>     IETF to
>>>>>>     >     see in which it would be helpful to include. From the (not
>>>>>>     so) old
>>>>>>     >     OpenFlow, I assume that one match is necessary (for
>>>>>> identify the
>>>>>>     >     iOAM/PoT header) whilst the source node can use any existing
>>>>>>     match
>>>>>>     >     field to identify packets where to apply the PoT scheme. In
>>>>>>     terms of
>>>>>>     >     actions, I would say that two may be required: for any node, an
>>>>>>     >     update-pot is necessary, while the verifier would need a
>>>>>>     verify-pot
>>>>>>     >     type of action, that would ideally either remove the header
>>>>>>     or drop
>>>>>>     >     the packet if fails (I do not know if you are thinking in more
>>>>>>     >     complex scenarios).____
>>>>>>     >
>>>>>>     >     *//*____
>>>>>>     >
>>>>>>     >     */…FB: From an OF perspective, that sounds feasible.. That
>>>>>>     said, we
>>>>>>     >     probably want to avoid making the spec specific to a
>>>>>>     technology like
>>>>>>     >     OF, hence would suggest that we don’t specify such a
>>>>>> behavior as
>>>>>>     >     part of this document./*____
>>>>>>     >
>>>>>>     >     *//*____
>>>>>>     >
>>>>>>     >     - For this last point, I have seen the definitions within
>>>>>>     >     draft-asechoud-rtgwg-qos-model-08, where matched could map
>>>>>>     (if I am
>>>>>>     >     not wrong) to classifiers/filters, and actions to actions. I
>>>>>>     send
>>>>>>     >     you the models in a zip file. In this sense the model to be
>>>>>>     defined
>>>>>>     >     in the PoT shall be an augment of the models defined in that
>>>>>>     >     document. I have not done a very deep revision on the model,
>>>>>>     but I
>>>>>>     >     think it could fit there. If you have check this or other
>>>>>>     models,
>>>>>>     >     let me know so I could also help.____
>>>>>>     >
>>>>>>     >     *//*____
>>>>>>     >
>>>>>>     >     */…FB: Per my note above: In order to keep POT generic and
>>>>>>     not link
>>>>>>     >     it to a particular classification mechanism, I’d prefer to
>>>>>>     keep the
>>>>>>     >     classification question as out of scope for the current
>>>>>>     document.
>>>>>>     >     That way it can also apply to technologies which come with
>>>>>>     their own
>>>>>>     >     way to classify – and which might fully decouple the tunneling
>>>>>>     >     aspects from the classification aspects. /*____
>>>>>>     >
>>>>>>     >     ____
>>>>>>     >
>>>>>>     >     Thanks a lot and sorry for such long email.____
>>>>>>     >
>>>>>>     >     ____
>>>>>>     >
>>>>>>     >     */..FB: Thanks again for all your comments. We’ll get them
>>>>>>     included
>>>>>>     >     in the next revision. /*____
>>>>>>     >
>>>>>>     >     *//*____
>>>>>>     >
>>>>>>     >     */Cheers, Frank/*____
>>>>>>     >
>>>>>>     >     ____
>>>>>>     >
>>>>>>     >     ____
>>>>>>     >
>>>>>>     >     ____
>>>>>>     >
>>>>>>     >     Best,____
>>>>>>     >
>>>>>>     >     Alejandro____
>>>>>>     >
>>>>>>     >     ____
>>>>>>     >
>>>>>>     >     ____
>>>>>>     >
>>>>>>     >     ____
>>>>>>     >
>>>>>>     >     ____
>>>>>>     >
>>>>>>     >
>>>>>>         ------------------------------------------------------------------------
>>>>>>     >
>>>>>>     >
>>>>>>     >     Este mensaje y sus adjuntos se dirigen exclusivamente a su
>>>>>>     >     destinatario, puede contener información privilegiada o
>>>>>>     confidencial
>>>>>>     >     y es para uso exclusivo de la persona o entidad de destino.
>>>>>>     Si no es
>>>>>>     >     usted. el destinatario indicado, queda notificado de que la
>>>>>>     lectura,
>>>>>>     >     utilización, divulgación y/o copia sin autorización puede estar
>>>>>>     >     prohibida en virtud de la legislación vigente. Si ha
>>>>>>     recibido este
>>>>>>     >     mensaje por error, le rogamos que nos lo comunique
>>>>>>     inmediatamente
>>>>>>     >     por esta misma vía y proceda a su destrucción.
>>>>>>     >
>>>>>>     >     The information contained in this transmission is
>>>>>> privileged and
>>>>>>     >     confidential information intended only for the use of the
>>>>>>     individual
>>>>>>     >     or entity named above. If the reader of this message is not the
>>>>>>     >     intended recipient, you are hereby notified that any
>>>>>>     dissemination,
>>>>>>     >     distribution or copying of this communication is strictly
>>>>>>     >     prohibited. If you have received this transmission in error,
>>>>>>     do not
>>>>>>     >     read it. Please immediately reply to the sender that you have
>>>>>>     >     received this communication in error and then delete it.
>>>>>>     >
>>>>>>     >     Esta mensagem e seus anexos se dirigem exclusivamente ao seu
>>>>>>     >     destinatário, pode conter informação privilegiada ou
>>>>>>     confidencial e
>>>>>>     >     é para uso exclusivo da pessoa ou entidade de destino. Se não é
>>>>>>     >     vossa senhoria o destinatário indicado, fica notificado de
>>>>>> que a
>>>>>>     >     leitura, utilização, divulgação e/ou cópia sem autorização pode
>>>>>>     >     estar proibida em virtude da legislação vigente. Se recebeu
>>>>>> esta
>>>>>>     >     mensagem por erro, rogamos-lhe que nos o comunique
>>>>>>     imediatamente por
>>>>>>     >     esta mesma via e proceda a sua destruição____
>>>>>>     >
>>>>>>     >     _______________________________________________
>>>>>>     >     sfc mailing list
>>>>>>     > sfc@ietf.org <mailto:sfc@ietf.org> <mailto:sfc@ietf.org>
>>>>>> <mailto:sfc@ietf.org
>>>>>>     <mailto:sfc@ietf.org>>
>>>>>>     > https://www.ietf.org/mailman/listinfo/sfc
>>>>>>     >
>>>>>>     >
>>>>>>     > _______________________________________________
>>>>>>     > sfc mailing list
>>>>>>     > sfc@ietf.org <mailto:sfc@ietf.org> <mailto:sfc@ietf.org>
>>>>>>     > https://www.ietf.org/mailman/listinfo/sfc
>>>>>>     >
>>>>>>
>>>>>> _______________________________________________
>>>>>> sfc mailing list
>>>>>> sfc@ietf.org <mailto:sfc@ietf.org> <mailto:sfc@ietf.org>
>>>>>> https://www.ietf.org/mailman/listinfo/sfc
>>>
>>
>> _______________________________________________
>> sfc mailing list
>> sfc@ietf.org
>> https://www.ietf.org/mailman/listinfo/sfc
> 


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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Wed, 1 Apr 2020 12:36:31 -0700
Message-ID: <CA+RyBmWQqiJQe9J0ufH+kVWYN5RnoK8xyJezMaUx68FH+n7noA@mail.gmail.com>
To: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
Cc: "Joel M. Halpern" <jmh@joelhalpern.com>, "sfc@ietf.org" <sfc@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/sfc/NPCL20PNUsXMzwuXCDFrD2thR7E>
Subject: Re: [sfc] draft-ietf-sfc-proof-of-transit-04 ready for WGLC? (was RE: PoT review/comments)
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Dear Carlos,
in my previous note I have recognized that POT, as SFC, can be realized
using different techniques. But this is SFC WG document and, as I
understand the charter of SFC WG, we're defining technologies that use SFC
NSH. Hence my conclusion that the reference to draft-ietf-sfc-ioam-nsh
should be normative, as that is the only document that defines iOAM
encapsulation in NSH. Making the reference informational could be
interpreted as suggestion that POT in SFC NSH might be encapsulated not as
iOAM but in some other manner. And while that is possible, I don't see a
proposal that describes such alternative encapsulation. So, it appears that
the WG has agreed that POT in SFC NSH should use encapsulation as defined
in draft-ietf-sfc-ioam-nsh.

Regards,
Greg

On Wed, Apr 1, 2020 at 12:16 PM Carlos Pignataro (cpignata) <
cpignata@cisco.com> wrote:

> Dear Greg,
>
> > 2020/04/01 =E5=8D=88=E5=BE=8C2:59=E3=80=81Greg Mirsky <gregimirsky@gmai=
l.com>=E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:
> >
> > Dear All,
> > I agree with Joel that the reference in draft-ietf-sfc-proof-of-transit
> to draft-ietf-ippm-ioam-data should be normative.
>
> Great. Everyone seems to be aligned on this point.
>
>
> > I also support the proposal to add in draft-ietf-sfc-proof-of-transit a
> normative reference to draft-ietf-sfc-ioam-nsh. SFC WG is working on
> defining SFC that is based on NSH (SFC NSH), and while SFC might be
> realized using other techniques, draft-ietf-sfc-ioam-nsh is, and likely
> will remain, the only document that is describing iOAM encapsulation in S=
FC
> NSH. Thus, I believe, for SFC WG, implementation of PoT based on iOAM
> requires implementation of iOAM encapsulation in SFC NSH, as defined in
> draft-ietf-sfc-ioam-nsh. Hence, the reference must be normative.
>
>
> This logic is flawed in the onset. The main point is that POT can be
> realized with a variety of transports and technologies and use-cases, one
> of which is SFC, and then further within SFC one of which is NSH.
>
> You seem to argue that NSH is somehow in practice the only SFC
> realization, and because of that the reference =E2=80=9Cmust be normative=
=E2=80=9D.
>
> I disagree with the premise, but regardless, it does not matter since POT
> applies to other non-SFC(-non-NSH) technologies. Therefore that since-the=
n
> logic does not apply.
>
> Copying the very first sentence of the Abstract:
>
>    Several technologies such as Traffic Engineering (TE), Service
>    Function Chaining (SFC), and policy based routing [...]
>
>
> And now looking at this fragment, I am more convinced that this is one
> example and as such Informative.
>
> I would not object to Normative for the right reasons, but the reason
> above, in my mind, does not follow.
>
> Thanks,
>
> Carlos.
>
>
> >
> > Regards,
> > Greg
> >
> > On Tue, Mar 24, 2020 at 2:25 PM Joel M. Halpern <jmh@joelhalpern.com>
> wrote:
> > I think we all agree that draft-ietf-sfc-proof-of-transit requires the
> > normative reference to draft-ietf-ippm-ioam-data.
> >
> > Regarding a reference from draft-ietf-sfc-proof-of-transit to
> > draft-ietf-sfc-ioam-nsh, I think we agree that it is needed.  The
> > question then is normative or informative.  If we use the usual IETF
> > rule that there has to be a defined normative way to interoperably
> > implement a protocol spec (with other options allowed), my inclination
> > is that the reference should be normative.
> >
> > Regarding the informative reference in the other direction from
> > draft-ietf-sfc-ioam-nsh to draft-ietf-sfc-proof-of-transit, while I
> > personally like the idea, that is up to you / the working group.
> >
> > Yours,
> > Joel
> >
> > On 3/24/2020 5:20 PM, Carlos Pignataro (cpignata) wrote:
> > > Hi, Joel,
> > >
> > > The way in which the doc hierarchy and relationship is structure seem=
s
> > > to support and potentially even require:
> > >
> > > From draft-ietf-sfc-proof-of-transit:
> > > * A normative reference to [I-D.ietf-ippm-ioam-data], since PoT gives
> > > over IOAM explicitly, and that exists.
> > > * Optionally, an Informative reference to draft-ietf-sfc-ioam-nsh,
> since
> > > that=E2=80=99s really one out of many ways to carry IOAM over NSH, bu=
t
> separated
> > > by document indirection. This does not exist but can be added.
> > >
> > >  From draft-ietf-sfc-ioam-nsh:
> > > * Optionally, an Informative reference to
> > > draft-ietf-sfc-proof-of-transit, since that=E2=80=99s one out of many
> > > applications. This does not exist but can be added.
> > >
> > > Thoughts?
> > >
> > > Best,
> > >
> > > Carlos.
> > >
> > >> 2020/03/24 =E5=8D=88=E5=BE=8C5:10=E3=80=81Joel M. Halpern <jmh@joelh=
alpern.com
> > >> <mailto:jmh@joelhalpern.com>>=E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:
> > >>
> > >> Carlos, it sounds like there should probably be a normative referenc=
e
> > >> from draft-ietf-sfc-proof of transit to draft-ietf-sfc-ioam-nsh?
> > >> Possibly in the same sentence that refers to
> draft-ietf-ippm-ioam-data?
> > >>
> > >> Yours,
> > >> Joel
> > >>
> > >> On 3/24/2020 4:54 PM, Carlos Pignataro (cpignata) wrote:
> > >>> Greg,
> > >>> The very first sentence of the PoT document reads:
> > >>>    Several technologies such as Traffic Engineering (TE), Service
> > >>>    Function Chaining (SFC), and policy based routing are used to
> steer
> > >>>    traffic through a specific, user-defined path.  This document
> defines
> > >>> Explaining how this document is applicable to various
> > >>> traffic-steering technologies.
> > >>> Section 3 then explains:
> > >>>    The POT information is encapsulated in packets as an IOAM Proof =
Of
> > >>>    Transit Option.  The details and format of the encapsulation and
> the
> > >>>    POT Option format are specified in [I-D.ietf-ippm-ioam-data].
> > >>> Which shows how to carry PoT in IOAM, with an appropriate pointer.
> > >>> Lastly, draft-ietf-sfc-ioam-nsh-03 defines IOAM over an NSH
> > >>> encapsulation.
> > >>> This arrangements maximizes specification modularity and
> > >>> portability/reusability.
> > >>> Best,
> > >>> Carlos.
> > >>>> 2020/03/24 =E5=8D=88=E5=BE=8C4:48=E3=80=81Greg Mirsky <gregimirsky=
@gmail.com
> > >>>> <mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com>>=E3=
=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:
> > >>>>
> > >>>> Hi Joel,
> > >>>> thank you for the most expedient response. As I understand it, iOA=
M
> > >>>> Data draft describes the format of the informational element that
> > >>>> carries POT-related information but it does not define how the
> > >>>> element to be carried in case of NSH encapsulation. And that is
> what
> > >>>> I was asking, apologies for not being clear in my first note.
> > >>>>
> > >>>> Regards,
> > >>>> Greg
> > >>>>
> > >>>> On Tue, Mar 24, 2020 at 1:42 PM Joel M.. Halpern
> > >>>> <jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>
> > >>>> <mailto:jmh@joelhalpern.com>> wrote:
> > >>>>
> > >>>>    Regarding the information carriage, the PoT document points to
> the
> > >>>>    IOAM
> > >>>>    document.
> > >>>>
> https://tools.ietf.org/html/draft-ietf-ippm-ioam-data-08#section-4.5
> > >>>>    gives the format (and ways to have other formats if needed.)
> > >>>>
> > >>>>    Yours,
> > >>>>    Joel
> > >>>>
> > >>>>    On 3/24/2020 4:26 PM, Greg Mirsky wrote:
> > >>>>    > Hi Frank,
> > >>>>    > thank you for reminding us about this important work, indeed =
we
> > >>>>    should
> > >>>>    > complete it. I've reviewed the draft and have several
> questions.
> > >>>>    Please
> > >>>>    > kindly consider:
> > >>>>    >
> > >>>>    >   * I couldn't find information where, relative to NSH, RND a=
nd
> > >>>>    CML are
> > >>>>    >     transported
> > >>>>    >   * for YANG data models using "reference" is strongly
> > >>>>    encouraged as it
> > >>>>    >     provides a pointer to the specification. Since the POT da=
ta
> > >>>>    model is
> > >>>>    >     in the same document as the POT specification, listing th=
e
> > >>>>    >     appropriate section should suffice
> > >>>>    >
> > >>>>    > Regards,
> > >>>>    > Greg
> > >>>>    >
> > >>>>    > On Thu, Mar 19, 2020 at 6:45 AM Frank Brockners (fbrockne)
> > >>>>    > <fbrockne=3D40cisco.com@dmarc.ietf.org
> > >>>> <mailto:fbrockne=3D40cisco.com@dmarc.ietf.org>
> > >>>>    <mailto:40cisco.com@dmarc.ietf.org>
> > >>>>    > <mailto:40cisco.com@dmarc.ietf.org
> > >>>>    <mailto:40cisco.com@dmarc.ietf.org>>> wrote:
> > >>>>    >
> > >>>>    >     Dear SFC WG,____
> > >>>>    >
> > >>>>    >     __ __
> > >>>>    >
> > >>>>    >     It=E2=80=99s been a while since we posted
> > >>>>    draft-ietf-sfc-proof-of-transit-04
> > >>>>    >     which addressed all known comments =E2=80=93 see below.
> > >>>>    >     I=E2=80=99ve not seen any more recent comments or questio=
ns come up
> > >>>>    =E2=80=93 and
> > >>>>    >     we=E2=80=99ve been through quite a few discussions and re=
views of
> this
> > >>>>    >     document already.____
> > >>>>    >
> > >>>>    >     __ __
> > >>>>    >
> > >>>>    >     Thus the question: Are we ready for WG LC?____
> > >>>>    >
> > >>>>    >     __ __
> > >>>>    >
> > >>>>    >     Thanks, Frank____
> > >>>>    >
> > >>>>    >     __ __
> > >>>>    >
> > >>>>    >     *From:* Frank Brockners (fbrockne)
> > >>>>    >     *Sent:* Donnerstag, 21. November 2019 08:21
> > >>>>    >     *To:* Alejandro Aguado FI <a.aguadom@fi.upm.es
> > >>>> <mailto:a.aguadom@fi.upm.es>
> > >>>>    <mailto:a.aguadom@fi.upm.es>
> > >>>>    >     <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es
> >>>;
> > >>>>    Diego R. Lopez
> > >>>>    >     <diego.r.lopez@telefonica.com
> > >>>> <mailto:diego.r.lopez@telefonica.com>
> > >>>>    <mailto:diego.r.lopez@telefonica.com>
> > >>>>    >     <mailto:diego.r.lopez@telefonica.com
> > >>>>    <mailto:diego.r.lopez@telefonica.com>>>; Carlos Pignataro
> (cpignata)
> > >>>>    >     <cpignata@cisco.com <mailto:cpignata@cisco.com>
> > >>>> <mailto:cpignata@cisco.com>
> > >>>>    <mailto:cpignata@cisco.com <mailto:cpignata@cisco..com>>>;
> > >>>>    ALEJANDRO AGUADO
> > >>>>    >     MARTIN <alejandro.aguadomartin.ext@telefonica.com
> > >>>> <mailto:alejandro.aguadomartin.ext@telefonica.com>
> > >>>>    <mailto:alejandro.aguadomartin..ext@telefonica.com>
> > >>>>    >     <mailto:alejandro.aguadomartin.ext@telefonica.com
> > >>>>    <mailto:alejandro.aguadomartin..ext@telefonica.com>>>; Shwetha
> > >>>>    >     Bhandari (shwethab) <shwethab@cisco.com
> > >>>> <mailto:shwethab@cisco.com>
> > >>>>    <mailto:shwethab@cisco.com>
> > >>>>    >     <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com>>>;
> > >>>>    Tal Mizrahi <tal.mizrahi.phd@gmail.com
> > >>>> <mailto:tal.mizrahi.phd@gmail.com>
> > >>>>    <mailto:tal.mizrahi.phd@gmail.com>
> > >>>>    >     <mailto:tal.mizrahi.phd@gmail.com
> > >>>>    <mailto:tal.mizrahi.phd@gmail.com>>>
> > >>>>    >     *Cc:* sfc@ietf.org <mailto:sfc@ietf.org> <mailto:
> sfc@ietf.org>
> > >>>>    <mailto:sfc@ietf.org <mailto:sfc@ietf.org>>
> > >>>>    >     *Subject:* RE: PoT review/comments____
> > >>>>    >
> > >>>>    >     __ __
> > >>>>    >
> > >>>>    >     We=E2=80=99ve just posted revision -04 of
> > >>>>    draft-ietf-sfc-proof-of-transit
> > >>>>    >     which now includes support for OPOT configuration in the
> > >>>>    yang model;____
> > >>>>    >
> > >>>>    >     see section 5.2.3 in
> > >>>>    > https://www.ietf.org/id/draft-ietf-sfc-proof-of-transit-04.tx=
t.
>
> > >>>> ____
> > >>>>    >
> > >>>>    >     The main addition is a grouping opot-profile, which adds
> > >>>>    upstream
> > >>>>    >     and downstream masks that OPOT requires.____
> > >>>>    >
> > >>>>    >     Thanks to Alejandro for suggesting these updates.____
> > >>>>    >
> > >>>>    >     __ __
> > >>>>    >
> > >>>>    >     This fixes the last =E2=80=9Cknown issue=E2=80=9D in
> > >>>>    >     draft-ietf-sfc-proof-of-transit. It would be great if you
> > >>>>    could give
> > >>>>    >     the document another careful read through.
> > >>>>    >     Are we ready for WGLC?____
> > >>>>    >
> > >>>>    >     __ __
> > >>>>    >
> > >>>>    >     Thanks, Frank____
> > >>>>    >
> > >>>>    >     __ __
> > >>>>    >
> > >>>>    >     __ __
> > >>>>    >
> > >>>>    >     *From:* Alejandro Aguado FI <a.aguadom@fi.upm.es
> > >>>> <mailto:a.aguadom@fi.upm.es>
> > >>>>    <mailto:a..aguadom@fi.upm.es>
> > >>>>    >     <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>=
>
> > >>>>    >     *Sent:* Donnerstag, 12. September 2019 15:40
> > >>>>    >     *To:* Diego R. Lopez <diego.r.lopez@telefonica.com
> > >>>> <mailto:diego.r.lopez@telefonica.com>
> > >>>>    <mailto:diego.r.lopez@telefonica.com>
> > >>>>    >     <mailto:diego.r.lopez@telefonica.com
> > >>>>    <mailto:diego.r.lopez@telefonica.com>>>; Carlos Pignataro
> (cpignata)
> > >>>>    >     <cpignata@cisco.com <mailto:cpignata@cisco.com>
> > >>>> <mailto:cpignata@cisco.com>
> > >>>>    <mailto:cpignata@cisco.com <mailto:cpignata@cisco..com>>>; Fran=
k
> > >>>>    Brockners
> > >>>>    >     (fbrockne) <fbrockne@cisco.com <mailto:fbrockne@cisco.com=
>
>
> > >>>> <mailto:fbrockne@cisco.com>
> > >>>>    <mailto:fbrockne@cisco.com <mailto:fbrockne@cisco.com>>>;
> > >>>>    >     ALEJANDRO AGUADO MARTIN
> > >>>>    <alejandro.aguadomartin.ext@telefonica.com
> > >>>> <mailto:alejandro.aguadomartin.ext@telefonica.com>
> > >>>>    <mailto:alejandro.aguadomartin.ext@telefonica.com>
> > >>>>    >     <mailto:alejandro.aguadomartin.ext@telefonica.com
> > >>>>    <mailto:alejandro.aguadomartin..ext@telefonica.com>>>; Shwetha
> > >>>>    >     Bhandari (shwethab) <shwethab@cisco.com
> > >>>> <mailto:shwethab@cisco.com>
> > >>>>    <mailto:shwethab@cisco.com>
> > >>>>    >     <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com>>>;
> > >>>>    Tal Mizrahi <tal.mizrahi.phd@gmail.com
> > >>>> <mailto:tal.mizrahi.phd@gmail.com>
> > >>>>    <mailto:tal.mizrahi.phd@gmail.com>
> > >>>>    >     <mailto:tal.mizrahi.phd@gmail.com
> > >>>>    <mailto:tal.mizrahi.phd@gmail.com>>>
> > >>>>    >     *Cc:* sfc@ietf.org <mailto:sfc@ietf.org> <mailto:
> sfc@ietf.org>
> > >>>>    <mailto:sfc@ietf.org <mailto:sfc@ietf.org>>
> > >>>>    >     *Subject:* Re: PoT review/comments____
> > >>>>    >
> > >>>>    >     __ __
> > >>>>    >
> > >>>>    >     Hi Shwetha,____
> > >>>>    >
> > >>>>    >     __ __
> > >>>>    >
> > >>>>    >     Yes, I think it is a good idea. From your points, the
> second
> > >>>>    one is
> > >>>>    >     a bit confusing to me... But I do not fully remember how
> the
> > >>>>    model
> > >>>>    >     was structured, so I need to revise the document.____
> > >>>>    >
> > >>>>    >     __ __
> > >>>>    >
> > >>>>    >     Give me a day or two to explore again the model, and
> either we
> > >>>>    >     exchange few emails with proposals for the extension, or
> we can
> > >>>>    >     organise a quick call during next week to close a final
> > >>>>    proposal to
> > >>>>    >     share with other contributors.____
> > >>>>    >
> > >>>>    >     __ __
> > >>>>    >
> > >>>>    >     Thanks!____
> > >>>>    >
> > >>>>    >     __ __
> > >>>>    >
> > >>>>    >     Best,____
> > >>>>    >
> > >>>>    >     Alejandro____
> > >>>>    >
> > >>>>    >     __ __
> > >>>>    >
> > >>>>    >     __ __
> > >>>>    >
> > >>>>    >     El 12 de septiembre de 2019 a las 8:52:44, Shwetha Bhanda=
ri
> > >>>>    >     (shwethab) (shwethab@cisco.com <mailto:shwethab@cisco.com=
>
>
> > >>>> <mailto:shwethab@cisco.com>
> > >>>>    <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com>>)
> > >>>>    >     escribi=C3=B3:____
> > >>>>    >
> > >>>>    >     Hi Alejandro, Diego,____
> > >>>>    >
> > >>>>    >     ____
> > >>>>    >
> > >>>>    >     Since you added extension to do OPoT, should we extend th=
e
> > >>>>    model in
> > >>>>    >     draft-ietf-sfc-proof-of-transit to enable OPoT and any
> > >>>>    parameters
> > >>>>    >     required for it  shared masks per link. If yes my proposa=
l
> > >>>>    will be
> > >>>>    >     to:____
> > >>>>    >
> > >>>>    >      1. Augment existing pot-profile with fields to Enable OP=
oT
> > >>>>    and a
> > >>>>    >         cipher scheme if needed.____
> > >>>>    >      2. Separate container in the model to define a map of
> (Node
> > >>>>    >         link/interface, mask) to distribute pair wise masks.
> For
> > >>>>    e.g.
> > >>>>    >         Node link/interface identifier can be UUID as defined
> in
> > >>>>    rfc8348
> > >>>>    >         Or____
> > >>>>    >      3. Masks can be part of pot-profile.____
> > >>>>    >
> > >>>>    >     ____
> > >>>>    >
> > >>>>    >     What do you think about revising the model with this?____
> > >>>>    >
> > >>>>    >     ____
> > >>>>    >
> > >>>>    >     Thanks,____
> > >>>>    >
> > >>>>    >     Shwetha____
> > >>>>    >
> > >>>>    >     ____
> > >>>>    >
> > >>>>    >     *From: *"Frank Brockners (fbrockne)" <fbrockne@cisco.com
> > >>>> <mailto:fbrockne@cisco.com>
> > >>>>    <mailto:fbrockne@cisco.com>
> > >>>>    >     <mailto:fbrockne@cisco.com <mailto:fbrockne@cisco.com>>>
> > >>>>    >     *Date: *Wednesday, September 11, 2019 at 2:34 PM
> > >>>>    >     *To: *ALEJANDRO AGUADO MARTIN
> > >>>>    >     <alejandro.aguadomartin.ext@telefonica.com
> > >>>> <mailto:alejandro.aguadomartin.ext@telefonica.com>
> > >>>>    <mailto:alejandro.aguadomartin.ext@telefonica.com>
> > >>>>    >     <mailto:alejandro.aguadomartin.ext@telefonica.com
> > >>>>    <mailto:alejandro.aguadomartin..ext@telefonica.com>>>, "Diego R=
.
> > >>>>    >     Lopez" <diego.r.lopez@telefonica.com
> > >>>> <mailto:diego.r.lopez@telefonica.com>
> > >>>>    <mailto:diego.r.lopez@telefonica.com>
> > >>>>    >     <mailto:diego.r..lopez@telefonica.com
> > >>>>    <mailto:diego.r..lopez@telefonica.com>>>, Carlos Pignataro
> > >>>>    >     <cpignata@cisco..com <mailto:cpignata@cisco.com
> > >>>>    <mailto:cpignata@cisco.com>>>, Shwetha bhandari
> > >>>>    >     <shwethab@cisco.com <mailto:shwethab@cisco.com>
> > >>>> <mailto:shwethab@cisco.com>
> > >>>>    <mailto:shwethab@cisco.com <mailto:shwethab@cisco..com>>>, Tal
> > >>>> Mizrahi
> > >>>>    >     <tal.mizrahi.phd@gmail.com <mailto:
> tal.mizrahi.phd@gmail.com>
> > >>>>    <mailto:tal.mizrahi.phd@gmail.com>
> > >>>>    <mailto:tal.mizrahi.phd@gmail.com
> > >>>> <mailto:tal.mizrahi.phd@gmail.com>>>
> > >>>>    >     *Cc: *"a..aguadom@fi.upm.es <mailto:a..aguadom@fi.upm.es>
> > >>>> <mailto:a..aguadom@fi.upm.es>
> > >>>>    <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>"
> > >>>>    >     <a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>
> > >>>> <mailto:a.aguadom@fi.upm.es>
> > >>>>    <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>>,
> > >>>>    "sfc@ietf.org <mailto:sfc@ietf.org> <mailto:sfc@ietf.org>
> > >>>>    >     <mailto:sfc@ietf.org <mailto:sfc@ietf.org>>" <sfc@ietf.or=
g
> > >>>> <mailto:sfc@ietf.org>
> > >>>>    <mailto:sfc@ietf.org> <mailto:sfc@ietf.org <mailto:sfc@ietf.org
> >>>
> > >>>>    >     *Subject: *RE: PoT review/comments____
> > >>>>    >
> > >>>>    >     ____
> > >>>>    >
> > >>>>    >     Hi Alejandro,____
> > >>>>    >
> > >>>>    >     ____
> > >>>>    >
> > >>>>    >     Thanks again for the review. Your comments have been
> > >>>>    integrated into
> > >>>>    >     draft-ietf-sfc-proof-of-transit-03 which just got
> posted.____
> > >>>>    >
> > >>>>    >     ____
> > >>>>    >
> > >>>>    >     Cheers, Frank____
> > >>>>    >
> > >>>>    >     ____
> > >>>>    >
> > >>>>    >     *From:*Frank Brockners (fbrockne)
> > >>>>    >     *Sent:* Montag, 27. Mai 2019 18:18
> > >>>>    >     *To:* ALEJANDRO AGUADO MARTIN
> > >>>>    >     <alejandro.aguadomartin.ext@telefonica.com
> > >>>> <mailto:alejandro.aguadomartin.ext@telefonica.com>
> > >>>>    <mailto:alejandro.aguadomartin.ext@telefonica.com>
> > >>>>    >     <mailto:alejandro.aguadomartin.ext@telefonica.com
> > >>>>    <mailto:alejandro.aguadomartin..ext@telefonica.com>>>; Diego R.
> Lopez
> > >>>>    >     <diego.r.lopez@telefonica.com
> > >>>> <mailto:diego.r.lopez@telefonica.com>
> > >>>>    <mailto:diego.r.lopez@telefonica.com>
> > >>>>    >     <mailto:diego.r.lopez@telefonica.com
> > >>>>    <mailto:diego.r.lopez@telefonica.com>>>; Carlos Pignataro
> (cpignata)
> > >>>>    >     <cpignata@cisco.com <mailto:cpignata@cisco.com>
> > >>>> <mailto:cpignata@cisco.com>
> > >>>>    <mailto:cpignata@cisco.com <mailto:cpignata@cisco..com>>>;
> Shwetha
> > >>>>    Bhandari
> > >>>>    >     (shwethab) <shwethab@cisco.com <mailto:shwethab@cisco.com=
>
>
> > >>>> <mailto:shwethab@cisco.com>
> > >>>>    <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com>>>; Tal
> > >>>>    >     Mizrahi <tal.mizrahi.phd@gmail.com
> > >>>> <mailto:tal.mizrahi.phd@gmail.com>
> > >>>>    <mailto:tal.mizrahi.phd@gmail..com>
> > >>>>    <mailto:tal.mizrahi.phd@gmail.com
> > >>>> <mailto:tal.mizrahi.phd@gmail.com>>>
> > >>>>    >     *Cc:* a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>
> > >>>> <mailto:a.aguadom@fi.upm.es>
> > >>>>    <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>;
> > >>>> sfc@ietf.org <mailto:sfc@ietf.org> <mailto:sfc@ietf.org>
> > >>>>    >     <mailto:sfc@ietf.org <mailto:sfc@ietf.org>>
> > >>>>    >     *Subject:* RE: PoT review/comments____
> > >>>>    >
> > >>>>    >     ____
> > >>>>    >
> > >>>>    >     Hi Alejandro,____
> > >>>>    >
> > >>>>    >     ____
> > >>>>    >
> > >>>>    >     Many thanks for the comments =E2=80=93 and sorry for the =
delay =E2=80=93
> > >>>>    >     unfortunately your email somehow got dropped from my todo
> list.
> > >>>>    >     Please see inline=E2=80=A6____
> > >>>>    >
> > >>>>    >     ____
> > >>>>    >
> > >>>>    >     (cc=E2=80=99ing the list as well).____
> > >>>>    >
> > >>>>    >     ____
> > >>>>    >
> > >>>>    >     *From:*ALEJANDRO AGUADO MARTIN
> > >>>>    >     <alejandro.aguadomartin..ext@telefonica.com
> > >>>> <mailto:alejandro.aguadomartin..ext@telefonica.com>
> > >>>>    <mailto:alejandro.aguadomartin..ext@telefonica.com>
> > >>>>    >     <mailto:alejandro.aguadomartin.ext@telefonica.com
> > >>>>    <mailto:alejandro.aguadomartin..ext@telefonica.com>>>
> > >>>>    >     *Sent:* Montag, 15. April 2019 17:27
> > >>>>    >     *To:* Diego R. Lopez <diego.r.lopez@telefonica.com
> > >>>> <mailto:diego.r.lopez@telefonica.com>
> > >>>>    <mailto:diego.r.lopez@telefonica.com>
> > >>>>    >     <mailto:diego.r.lopez@telefonica.com
> > >>>>    <mailto:diego.r.lopez@telefonica.com>>>; Carlos Pignataro
> (cpignata)
> > >>>>    >     <cpignata@cisco.com <mailto:cpignata@cisco.com>
> > >>>> <mailto:cpignata@cisco.com>
> > >>>>    <mailto:cpignata@cisco.com <mailto:cpignata@cisco..com>>>; Fran=
k
> > >>>>    Brockners
> > >>>>    >     (fbrockne) <fbrockne@cisco.com <mailto:fbrockne@cisco.com=
>
>
> > >>>> <mailto:fbrockne@cisco.com>
> > >>>>    <mailto:fbrockne@cisco.com <mailto:fbrockne@cisco.com>>>;
> Shwetha
> > >>>>    >     Bhandari (shwethab) <shwethab@cisco.com
> > >>>> <mailto:shwethab@cisco.com>
> > >>>>    <mailto:shwethab@cisco.com>
> > >>>>    >     <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com>>>;
> > >>>>    Tal Mizrahi <tal.mizrahi.phd@gmail.com
> > >>>> <mailto:tal.mizrahi.phd@gmail.com>
> > >>>>    <mailto:tal.mizrahi.phd@gmail.com>
> > >>>>    >     <mailto:tal.mizrahi.phd@gmail.com
> > >>>>    <mailto:tal.mizrahi.phd@gmail.com>>>
> > >>>>    >     *Cc:* a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>
> > >>>> <mailto:a.aguadom@fi.upm.es>
> > >>>>    <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>
> > >>>>    >     *Subject:* PoT review/comments____
> > >>>>    >
> > >>>>    >     ____
> > >>>>    >
> > >>>>    >     Dear all,____
> > >>>>    >
> > >>>>    >     ____
> > >>>>    >
> > >>>>    >     I gave a quick review to the PoT document. Some
> comments:____
> > >>>>    >
> > >>>>    >     ____
> > >>>>    >
> > >>>>    >     - I read =E2=80=9CThe non-constant coefficients are used =
to
> > >>>> generate the
> > >>>>    >     Lagrange Polynomial Constants (LPC).=E2=80=9D As far as I
> > >>>>    understood, the
> > >>>>    >     points assigned to each node (Xi) are the ones used for
> > >>>>    generating
> > >>>>    >     the LPCi, aren=E2=80=99t they?____
> > >>>>    >
> > >>>>    >     */=E2=80=A6FB: Good catch. The LPCs are of course compute=
d using
> (x_i,
> > >>>>    >     y_i)./*____
> > >>>>    >
> > >>>>    >     - If we go for including the YANG in the current document
> > >>>>    (which I
> > >>>>    >     agree), parameters should be described before the yang
> > >>>>    definition,
> > >>>>    >     and maybe it would be helpful to have the yang tree (see
> the
> > >>>>    current
> > >>>>    >     version attached).____
> > >>>>    >
> > >>>>    >     */=E2=80=A6FB: Thanks. IMHO it makes sense to keep the YA=
NG model
> > >>>> in the
> > >>>>    >     current doc, given that the model and the description go
> > >>>> hand in
> > >>>>    >     hand. We can of course also include the yang tree to make
> > >>>>    reading
> > >>>>    >     easier. This is consistent with other documents which
> > >>>>    specify YANG
> > >>>>    >     models./*____
> > >>>>    >
> > >>>>    >     - I include in the attached file few questions about nami=
ng
> > >>>>    of some
> > >>>>    >     parameters.____
> > >>>>    >
> > >>>>    >     *//*____
> > >>>>    >
> > >>>>    >     */=E2=80=A6FB:
> > >>>>    >     - naming F_i(x_i, y_i) =E2=80=93 I agree that a better na=
me could
> be
> > >>>>    used.
> > >>>>    >     The only potential concern would be that the open source
> > >>>>    >     implementation in OpenDaylight uses this naming =E2=80=93=
 changing
> > >>>>    it might
> > >>>>    >     lead to confusion.. We can start with adding a comment to
> make
> > >>>>    >     things clearer./*____
> > >>>>    >
> > >>>>    >     *//*____
> > >>>>    >
> > >>>>    >     */- secret key =E2=80=93 this is the constant part of the=
 first
> > >>>>    polynomial
> > >>>>    >     which serves as the secret =E2=80=93 and which is re-retr=
ieved.
> > >>>>    Again, we
> > >>>>    >     can update the description to make things clearer./*____
> > >>>>    >
> > >>>>    >     *//*____
> > >>>>    >
> > >>>>    >     */- size of the random number: This is unrelated to OPOT.
> > >>>>    The random
> > >>>>    >     number is to uniquely identify a packet. There is a
> trade-off
> > >>>>    >     between the size of the random number and how often you
> need to
> > >>>>    >     re-key your system. At high speeds, the random number =E2=
=80=93
> which
> > >>>>    >     identifies a particular packet =E2=80=93 is used up quite=
 quickly
> if
> > >>>>    it is
> > >>>>    >     only 32-bit wide. See section 4
> > >>>>    >
> > >>>>        /*
> https://tools.ietf.org/html/draft-ietf-sfc-proof-of-transit-02#section-4_=
___
> > >>>>    >
> > >>>>    >     *//*____
> > >>>>    >
> > >>>>    >     */- number of profiles: For a deployment which is expecte=
d
> > >>>>    to renew
> > >>>>    >     keys every now and then (e.g. you run with 32-bit random
> > >>>>    numbers at
> > >>>>    >     reasonably high speeds), you need at least 2 profiles =E2=
=80=93 an
> > >>>>    active
> > >>>>    >     one and one that you can activate once you run out of
> random
> > >>>>    numbers
> > >>>>    >     (which is what the encapsulating node would decide)..
> /*____
> > >>>>    >
> > >>>>    >     - I have checked some of the existing YANG files within t=
he
> > >>>>    IETF to
> > >>>>    >     see in which it would be helpful to include. From the (no=
t
> > >>>>    so) old
> > >>>>    >     OpenFlow, I assume that one match is necessary (for
> > >>>> identify the
> > >>>>    >     iOAM/PoT header) whilst the source node can use any
> existing
> > >>>>    match
> > >>>>    >     field to identify packets where to apply the PoT scheme. =
In
> > >>>>    terms of
> > >>>>    >     actions, I would say that two may be required: for any
> node, an
> > >>>>    >     update-pot is necessary, while the verifier would need a
> > >>>>    verify-pot
> > >>>>    >     type of action, that would ideally either remove the head=
er
> > >>>>    or drop
> > >>>>    >     the packet if fails (I do not know if you are thinking in
> more
> > >>>>    >     complex scenarios).____
> > >>>>    >
> > >>>>    >     *//*____
> > >>>>    >
> > >>>>    >     */=E2=80=A6FB: From an OF perspective, that sounds feasib=
le.. That
> > >>>>    said, we
> > >>>>    >     probably want to avoid making the spec specific to a
> > >>>>    technology like
> > >>>>    >     OF, hence would suggest that we don=E2=80=99t specify suc=
h a
> > >>>> behavior as
> > >>>>    >     part of this document./*____
> > >>>>    >
> > >>>>    >     *//*____
> > >>>>    >
> > >>>>    >     - For this last point, I have seen the definitions within
> > >>>>    >     draft-asechoud-rtgwg-qos-model-08, where matched could ma=
p
> > >>>>    (if I am
> > >>>>    >     not wrong) to classifiers/filters, and actions to actions=
.
> I
> > >>>>    send
> > >>>>    >     you the models in a zip file. In this sense the model to =
be
> > >>>>    defined
> > >>>>    >     in the PoT shall be an augment of the models defined in
> that
> > >>>>    >     document. I have not done a very deep revision on the
> model,
> > >>>>    but I
> > >>>>    >     think it could fit there. If you have check this or other
> > >>>>    models,
> > >>>>    >     let me know so I could also help.____
> > >>>>    >
> > >>>>    >     *//*____
> > >>>>    >
> > >>>>    >     */=E2=80=A6FB: Per my note above: In order to keep POT ge=
neric and
> > >>>>    not link
> > >>>>    >     it to a particular classification mechanism, I=E2=80=99d =
prefer to
> > >>>>    keep the
> > >>>>    >     classification question as out of scope for the current
> > >>>>    document.
> > >>>>    >     That way it can also apply to technologies which come wit=
h
> > >>>>    their own
> > >>>>    >     way to classify =E2=80=93 and which might fully decouple =
the
> tunneling
> > >>>>    >     aspects from the classification aspects. /*____
> > >>>>    >
> > >>>>    >     ____
> > >>>>    >
> > >>>>    >     Thanks a lot and sorry for such long email.____
> > >>>>    >
> > >>>>    >     ____
> > >>>>    >
> > >>>>    >     */..FB: Thanks again for all your comments. We=E2=80=99ll=
 get them
> > >>>>    included
> > >>>>    >     in the next revision. /*____
> > >>>>    >
> > >>>>    >     *//*____
> > >>>>    >
> > >>>>    >     */Cheers, Frank/*____
> > >>>>    >
> > >>>>    >     ____
> > >>>>    >
> > >>>>    >     ____
> > >>>>    >
> > >>>>    >     ____
> > >>>>    >
> > >>>>    >     Best,____
> > >>>>    >
> > >>>>    >     Alejandro____
> > >>>>    >
> > >>>>    >     ____
> > >>>>    >
> > >>>>    >     ____
> > >>>>    >
> > >>>>    >     ____
> > >>>>    >
> > >>>>    >     ____
> > >>>>    >
> > >>>>    >
> > >>>>
> ------------------------------------------------------------------------
> > >>>>    >
> > >>>>    >
> > >>>>    >     Este mensaje y sus adjuntos se dirigen exclusivamente a s=
u
> > >>>>    >     destinatario, puede contener informaci=C3=B3n privilegiad=
a o
> > >>>>    confidencial
> > >>>>    >     y es para uso exclusivo de la persona o entidad de destin=
o.
> > >>>>    Si no es
> > >>>>    >     usted. el destinatario indicado, queda notificado de que =
la
> > >>>>    lectura,
> > >>>>    >     utilizaci=C3=B3n, divulgaci=C3=B3n y/o copia sin autoriza=
ci=C3=B3n puede
> estar
> > >>>>    >     prohibida en virtud de la legislaci=C3=B3n vigente. Si ha
> > >>>>    recibido este
> > >>>>    >     mensaje por error, le rogamos que nos lo comunique
> > >>>>    inmediatamente
> > >>>>    >     por esta misma v=C3=ADa y proceda a su destrucci=C3=B3n.
> > >>>>    >
> > >>>>    >     The information contained in this transmission is
> > >>>> privileged and
> > >>>>    >     confidential information intended only for the use of the
> > >>>>    individual
> > >>>>    >     or entity named above. If the reader of this message is
> not the
> > >>>>    >     intended recipient, you are hereby notified that any
> > >>>>    dissemination,
> > >>>>    >     distribution or copying of this communication is strictly
> > >>>>    >     prohibited. If you have received this transmission in
> error,
> > >>>>    do not
> > >>>>    >     read it. Please immediately reply to the sender that you
> have
> > >>>>    >     received this communication in error and then delete it.
> > >>>>    >
> > >>>>    >     Esta mensagem e seus anexos se dirigem exclusivamente ao
> seu
> > >>>>    >     destinat=C3=A1rio, pode conter informa=C3=A7=C3=A3o privi=
legiada ou
> > >>>>    confidencial e
> > >>>>    >     =C3=A9 para uso exclusivo da pessoa ou entidade de destin=
o. Se
> n=C3=A3o =C3=A9
> > >>>>    >     vossa senhoria o destinat=C3=A1rio indicado, fica notific=
ado de
> > >>>> que a
> > >>>>    >     leitura, utiliza=C3=A7=C3=A3o, divulga=C3=A7=C3=A3o e/ou =
c=C3=B3pia sem autoriza=C3=A7=C3=A3o
> pode
> > >>>>    >     estar proibida em virtude da legisla=C3=A7=C3=A3o vigente=
. Se
> recebeu
> > >>>> esta
> > >>>>    >     mensagem por erro, rogamos-lhe que nos o comunique
> > >>>>    imediatamente por
> > >>>>    >     esta mesma via e proceda a sua destrui=C3=A7=C3=A3o____
> > >>>>    >
> > >>>>    >     _______________________________________________
> > >>>>    >     sfc mailing list
> > >>>>    > sfc@ietf.org <mailto:sfc@ietf.org> <mailto:sfc@ietf.org>
> > >>>> <mailto:sfc@ietf.org
> > >>>>    <mailto:sfc@ietf.org>>
> > >>>>    > https://www.ietf.org/mailman/listinfo/sfc
> > >>>>    >
> > >>>>    >
> > >>>>    > _______________________________________________
> > >>>>    > sfc mailing list
> > >>>>    > sfc@ietf.org <mailto:sfc@ietf.org> <mailto:sfc@ietf.org>
> > >>>>    > https://www.ietf.org/mailman/listinfo/sfc
> > >>>>    >
> > >>>>
> > >>>> _______________________________________________
> > >>>> sfc mailing list
> > >>>> sfc@ietf.org <mailto:sfc@ietf.org> <mailto:sfc@ietf.org>
> > >>>> https://www.ietf.org/mailman/listinfo/sfc
> > >
> >
> > _______________________________________________
> > sfc mailing list
> > sfc@ietf.org
> > https://www.ietf.org/mailman/listinfo/sfc
>
>

--000000000000ced71a05a23fcd6a
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Dear Carlos,<div>in my previous note I have recognized tha=
t POT, as SFC, can be realized using different techniques. But this is SFC =
WG document and, as I understand the charter of SFC WG, we&#39;re defining =
technologies that use SFC NSH. Hence my conclusion that the reference to=C2=
=A0<span style=3D"font-size:1em;color:rgb(0,0,0)">draft-ietf-sfc-ioam-nsh s=
hould=C2=A0be normative, as that is the only document that defines iOAM enc=
apsulation in NSH. Making the reference informational could be interpreted=
=C2=A0as suggestion that POT in SFC NSH might be encapsulated not as iOAM b=
ut in some other manner. And while that is possible, I don&#39;t see a prop=
osal that describes such alternative encapsulation. So, it appears that the=
 WG has agreed that POT in SFC NSH should use encapsulation as defined in=
=C2=A0</span>draft-ietf-sfc-ioam-nsh.=C2=A0</div><div><span style=3D"font-s=
ize:1em;color:rgb(0,0,0)"><br></span></div><div><span style=3D"font-size:1e=
m;color:rgb(0,0,0)">Regards,</span></div><div><span style=3D"font-size:1em;=
color:rgb(0,0,0)">Greg</span></div></div><br><div class=3D"gmail_quote"><di=
v dir=3D"ltr" class=3D"gmail_attr">On Wed, Apr 1, 2020 at 12:16 PM Carlos P=
ignataro (cpignata) &lt;<a href=3D"mailto:cpignata@cisco.com">cpignata@cisc=
o.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"ma=
rgin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:=
1ex">Dear Greg,<br>
<br>
&gt; 2020/04/01 =E5=8D=88=E5=BE=8C2:59=E3=80=81Greg Mirsky &lt;<a href=3D"m=
ailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.com</a>&gt=
;=E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:<br>
&gt; <br>
&gt; Dear All,<br>
&gt; I agree with Joel that the reference in draft-ietf-sfc-proof-of-transi=
t to draft-ietf-ippm-ioam-data should be normative.<br>
<br>
Great. Everyone seems to be aligned on this point.<br>
<br>
<br>
&gt; I also support the proposal to add in draft-ietf-sfc-proof-of-transit =
a normative reference to draft-ietf-sfc-ioam-nsh. SFC WG is working on defi=
ning SFC that is based on NSH (SFC NSH), and while SFC might be realized us=
ing other techniques, draft-ietf-sfc-ioam-nsh is, and likely will remain, t=
he only document that is describing iOAM encapsulation in SFC NSH. Thus, I =
believe, for SFC WG, implementation of PoT based on iOAM requires implement=
ation of iOAM encapsulation in SFC NSH, as defined in draft-ietf-sfc-ioam-n=
sh. Hence, the reference must be normative.<br>
<br>
<br>
This logic is flawed in the onset. The main point is that POT can be realiz=
ed with a variety of transports and technologies and use-cases, one of whic=
h is SFC, and then further within SFC one of which is NSH. <br>
<br>
You seem to argue that NSH is somehow in practice the only SFC realization,=
 and because of that the reference =E2=80=9Cmust be normative=E2=80=9D.<br>
<br>
I disagree with the premise, but regardless, it does not matter since POT a=
pplies to other non-SFC(-non-NSH) technologies. Therefore that since-then l=
ogic does not apply.<br>
<br>
Copying the very first sentence of the Abstract:<br>
<br>
=C2=A0 =C2=A0Several technologies such as Traffic Engineering (TE), Service=
<br>
=C2=A0 =C2=A0Function Chaining (SFC), and policy based routing [...]<br>
<br>
<br>
And now looking at this fragment, I am more convinced that this is one exam=
ple and as such Informative. <br>
<br>
I would not object to Normative for the right reasons, but the reason above=
, in my mind, does not follow.<br>
<br>
Thanks,<br>
<br>
Carlos.<br>
<br>
<br>
&gt; <br>
&gt; Regards,<br>
&gt; Greg<br>
&gt; <br>
&gt; On Tue, Mar 24, 2020 at 2:25 PM Joel M. Halpern &lt;<a href=3D"mailto:=
jmh@joelhalpern.com" target=3D"_blank">jmh@joelhalpern.com</a>&gt; wrote:<b=
r>
&gt; I think we all agree that draft-ietf-sfc-proof-of-transit requires the=
 <br>
&gt; normative reference to draft-ietf-ippm-ioam-data.<br>
&gt; <br>
&gt; Regarding a reference from draft-ietf-sfc-proof-of-transit to <br>
&gt; draft-ietf-sfc-ioam-nsh, I think we agree that it is needed.=C2=A0 The=
 <br>
&gt; question then is normative or informative.=C2=A0 If we use the usual I=
ETF <br>
&gt; rule that there has to be a defined normative way to interoperably <br=
>
&gt; implement a protocol spec (with other options allowed), my inclination=
 <br>
&gt; is that the reference should be normative.<br>
&gt; <br>
&gt; Regarding the informative reference in the other direction from <br>
&gt; draft-ietf-sfc-ioam-nsh to draft-ietf-sfc-proof-of-transit, while I <b=
r>
&gt; personally like the idea, that is up to you / the working group.<br>
&gt; <br>
&gt; Yours,<br>
&gt; Joel<br>
&gt; <br>
&gt; On 3/24/2020 5:20 PM, Carlos Pignataro (cpignata) wrote:<br>
&gt; &gt; Hi, Joel,<br>
&gt; &gt; <br>
&gt; &gt; The way in which the doc hierarchy and relationship is structure =
seems <br>
&gt; &gt; to support and potentially even require:<br>
&gt; &gt; <br>
&gt; &gt; From draft-ietf-sfc-proof-of-transit:<br>
&gt; &gt; * A normative reference to [I-D.ietf-ippm-ioam-data], since PoT g=
ives <br>
&gt; &gt; over IOAM explicitly, and that exists.<br>
&gt; &gt; * Optionally, an Informative reference to draft-ietf-sfc-ioam-nsh=
, since <br>
&gt; &gt; that=E2=80=99s really one out of many ways to carry IOAM over NSH=
, but separated <br>
&gt; &gt; by document indirection. This does not exist but can be added.<br=
>
&gt; &gt; <br>
&gt; &gt;=C2=A0 From draft-ietf-sfc-ioam-nsh:<br>
&gt; &gt; * Optionally, an Informative reference to <br>
&gt; &gt; draft-ietf-sfc-proof-of-transit, since that=E2=80=99s one out of =
many <br>
&gt; &gt; applications. This does not exist but can be added.<br>
&gt; &gt; <br>
&gt; &gt; Thoughts?<br>
&gt; &gt; <br>
&gt; &gt; Best,<br>
&gt; &gt; <br>
&gt; &gt; Carlos.<br>
&gt; &gt; <br>
&gt; &gt;&gt; 2020/03/24 =E5=8D=88=E5=BE=8C5:10=E3=80=81Joel M. Halpern &lt=
;<a href=3D"mailto:jmh@joelhalpern.com" target=3D"_blank">jmh@joelhalpern.c=
om</a> <br>
&gt; &gt;&gt; &lt;mailto:<a href=3D"mailto:jmh@joelhalpern.com" target=3D"_=
blank">jmh@joelhalpern.com</a>&gt;&gt;=E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:=
<br>
&gt; &gt;&gt;<br>
&gt; &gt;&gt; Carlos, it sounds like there should probably be a normative r=
eference <br>
&gt; &gt;&gt; from draft-ietf-sfc-proof of transit to draft-ietf-sfc-ioam-n=
sh? <br>
&gt; &gt;&gt; Possibly in the same sentence that refers to draft-ietf-ippm-=
ioam-data?<br>
&gt; &gt;&gt;<br>
&gt; &gt;&gt; Yours,<br>
&gt; &gt;&gt; Joel<br>
&gt; &gt;&gt;<br>
&gt; &gt;&gt; On 3/24/2020 4:54 PM, Carlos Pignataro (cpignata) wrote:<br>
&gt; &gt;&gt;&gt; Greg,<br>
&gt; &gt;&gt;&gt; The very first sentence of the PoT document reads:<br>
&gt; &gt;&gt;&gt;=C2=A0 =C2=A0 Several technologies such as Traffic Enginee=
ring (TE), Service<br>
&gt; &gt;&gt;&gt;=C2=A0 =C2=A0 Function Chaining (SFC), and policy based ro=
uting are used to steer<br>
&gt; &gt;&gt;&gt;=C2=A0 =C2=A0 traffic through a specific, user-defined pat=
h.=C2=A0 This document defines<br>
&gt; &gt;&gt;&gt; Explaining how this document is applicable to various <br=
>
&gt; &gt;&gt;&gt; traffic-steering technologies.<br>
&gt; &gt;&gt;&gt; Section 3 then explains:<br>
&gt; &gt;&gt;&gt;=C2=A0 =C2=A0 The POT information is encapsulated in packe=
ts as an IOAM Proof Of<br>
&gt; &gt;&gt;&gt;=C2=A0 =C2=A0 Transit Option.=C2=A0 The details and format=
 of the encapsulation and the<br>
&gt; &gt;&gt;&gt;=C2=A0 =C2=A0 POT Option format are specified in [I-D.ietf=
-ippm-ioam-data].<br>
&gt; &gt;&gt;&gt; Which shows how to carry PoT in IOAM, with an appropriate=
 pointer.<br>
&gt; &gt;&gt;&gt; Lastly, draft-ietf-sfc-ioam-nsh-03 defines IOAM over an N=
SH <br>
&gt; &gt;&gt;&gt; encapsulation.<br>
&gt; &gt;&gt;&gt; This arrangements maximizes specification modularity and =
<br>
&gt; &gt;&gt;&gt; portability/reusability.<br>
&gt; &gt;&gt;&gt; Best,<br>
&gt; &gt;&gt;&gt; Carlos.<br>
&gt; &gt;&gt;&gt;&gt; 2020/03/24 =E5=8D=88=E5=BE=8C4:48=E3=80=81Greg Mirsky=
 &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky=
@gmail.com</a> <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:gregimirsky@gmail.com" t=
arget=3D"_blank">gregimirsky@gmail.com</a>&gt; &lt;mailto:<a href=3D"mailto=
:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.com</a>&gt;&gt;=
=E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:<br>
&gt; &gt;&gt;&gt;&gt;<br>
&gt; &gt;&gt;&gt;&gt; Hi Joel,<br>
&gt; &gt;&gt;&gt;&gt; thank you for the most expedient response. As I under=
stand it, iOAM <br>
&gt; &gt;&gt;&gt;&gt; Data draft describes the format of the informational =
element that <br>
&gt; &gt;&gt;&gt;&gt; carries POT-related information but it does not defin=
e how the <br>
&gt; &gt;&gt;&gt;&gt; element to be carried in case of NSH encapsulation. A=
nd that is what <br>
&gt; &gt;&gt;&gt;&gt; I was asking, apologies for not being clear in my fir=
st note.<br>
&gt; &gt;&gt;&gt;&gt;<br>
&gt; &gt;&gt;&gt;&gt; Regards,<br>
&gt; &gt;&gt;&gt;&gt; Greg<br>
&gt; &gt;&gt;&gt;&gt;<br>
&gt; &gt;&gt;&gt;&gt; On Tue, Mar 24, 2020 at 1:42 PM Joel M.. Halpern <br>
&gt; &gt;&gt;&gt;&gt; &lt;<a href=3D"mailto:jmh@joelhalpern.com" target=3D"=
_blank">jmh@joelhalpern.com</a> &lt;mailto:<a href=3D"mailto:jmh@joelhalper=
n.com" target=3D"_blank">jmh@joelhalpern.com</a>&gt; <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:jmh@joelhalpern.com" tar=
get=3D"_blank">jmh@joelhalpern.com</a>&gt;&gt; wrote:<br>
&gt; &gt;&gt;&gt;&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Regarding the information carriage, the =
PoT document points to the<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 IOAM<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 document.<br>
&gt; &gt;&gt;&gt;&gt; <a href=3D"https://tools.ietf.org/html/draft-ietf-ipp=
m-ioam-data-08#section-4.5" rel=3D"noreferrer" target=3D"_blank">https://to=
ols.ietf.org/html/draft-ietf-ippm-ioam-data-08#section-4.5</a><br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 gives the format (and ways to have other=
 formats if needed.)<br>
&gt; &gt;&gt;&gt;&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Yours,<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Joel<br>
&gt; &gt;&gt;&gt;&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 On 3/24/2020 4:26 PM, Greg Mirsky wrote:=
<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; Hi Frank,<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; thank you for reminding us about th=
is important work, indeed we<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 should<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; complete it. I&#39;ve reviewed the =
draft and have several questions.<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Please<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; kindly consider:<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0* I couldn&#39;t find i=
nformation where, relative to NSH, RND and<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 CML are<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0transported<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0* for YANG data models =
using &quot;reference&quot; is strongly<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 encouraged as it<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0provides a point=
er to the specification. Since the POT data<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 model is<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0in the same docu=
ment as the POT specification, listing the<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0appropriate sect=
ion should suffice<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; Regards,<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; Greg<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; On Thu, Mar 19, 2020 at 6:45 AM Fra=
nk Brockners (fbrockne)<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; &lt;fbrockne=3D<a href=3D"mailto:40=
cisco.com@dmarc.ietf.org" target=3D"_blank">40cisco.com@dmarc.ietf.org</a> =
<br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:fbrockne" target=3D"_bla=
nk">fbrockne</a>=3D<a href=3D"mailto:40cisco.com@dmarc.ietf.org" target=3D"=
_blank">40cisco.com@dmarc.ietf.org</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:40cisco.com=
@dmarc.ietf.org" target=3D"_blank">40cisco.com@dmarc.ietf.org</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; &lt;mailto:<a href=3D"mailto:40cisc=
o.com@dmarc.ietf.org" target=3D"_blank">40cisco.com@dmarc.ietf.org</a><br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:40cisco.com=
@dmarc.ietf.org" target=3D"_blank">40cisco.com@dmarc.ietf.org</a>&gt;&gt;&g=
t; wrote:<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Dear SFC WG,____=
<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0It=E2=80=99s bee=
n a while since we posted<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 draft-ietf-sfc-proof-of-transit-04<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0which addressed =
all known comments =E2=80=93 see below.<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0I=E2=80=99ve not=
 seen any more recent comments or questions come up<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 =E2=80=93 and<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0we=E2=80=99ve be=
en through quite a few discussions and reviews of this<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0document already=
.____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Thus the questio=
n: Are we ready for WG LC?____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Thanks, Frank___=
_<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*From:* Frank Br=
ockners (fbrockne)<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Sent:* Donnerst=
ag, 21. November 2019 08:21<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*To:* Alejandro =
Aguado FI &lt;<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.ag=
uadom@fi.upm.es</a> <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es" tar=
get=3D"_blank">a.aguadom@fi.upm.es</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:a.aguadom@f=
i.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a>=
 &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.agua=
dom@fi.upm.es</a>&gt;&gt;&gt;;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Diego R. Lopez<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=3D"m=
ailto:diego.r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@telefon=
ica.com</a> <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:diego.r.lopez@telefonica=
.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.r.lop=
ez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<b=
r>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@=
telefonica.com</a><br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.r.lop=
ez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;&g=
t;&gt;; Carlos Pignataro (cpignata)<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=3D"m=
ailto:cpignata@cisco.com" target=3D"_blank">cpignata@cisco.com</a> &lt;mail=
to:<a href=3D"mailto:cpignata@cisco.com" target=3D"_blank">cpignata@cisco.c=
om</a>&gt; <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:cpignata@cisco.com" targ=
et=3D"_blank">cpignata@cisco.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:cpignata@ci=
sco.com" target=3D"_blank">cpignata@cisco.com</a> &lt;mailto:<a href=3D"mai=
lto:cpignata@cisco." target=3D"_blank">cpignata@cisco.</a>.com&gt;&gt;&gt;;=
<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 ALEJANDRO AGUADO<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0MARTIN &lt;<a hr=
ef=3D"mailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_blank">a=
lejandro.aguadomartin.ext@telefonica.com</a> <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:alejandro.aguadomartin.e=
xt@telefonica.com" target=3D"_blank">alejandro.aguadomartin.ext@telefonica.=
com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejandro.a=
guadomartin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin..=
ext@telefonica.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_blank">a=
lejandro.aguadomartin.ext@telefonica.com</a><br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejandro.a=
guadomartin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin..=
ext@telefonica.com</a>&gt;&gt;&gt;; Shwetha<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Bhandari (shweth=
ab) &lt;<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@ci=
sco.com</a> <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:shwethab@cisco.com" targ=
et=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:shwethab@ci=
sco.com" target=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com</a> &=
lt;mailto:<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@=
cisco.com</a>&gt;&gt;&gt;;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Tal Mizrahi &lt;<a href=3D"mailto:tal.mi=
zrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a> <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:tal.mizrahi.phd@gmail.co=
m" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mizrahi=
.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:tal.mizrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@g=
mail.com</a><br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mizrahi=
.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;&gt;&gt;=
<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Cc:* <a href=3D=
"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a href=
=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt; &lt;mailto:=
<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:sfc@ietf.or=
g" target=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a href=3D"mailto:sfc@ietf=
.org" target=3D"_blank">sfc@ietf.org</a>&gt;&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Subject:* RE: P=
oT review/comments____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0We=E2=80=99ve ju=
st posted revision -04 of<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 draft-ietf-sfc-proof-of-transit<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0which now includ=
es support for OPOT configuration in the<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 yang model;____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0see section 5.2.=
3 in<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; <a href=3D"https://www.ietf.org/id/=
draft-ietf-sfc-proof-of-transit-04.txt" rel=3D"noreferrer" target=3D"_blank=
">https://www.ietf.org/id/draft-ietf-sfc-proof-of-transit-04.txt</a>. <br>
&gt; &gt;&gt;&gt;&gt; ____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0The main additio=
n is a grouping opot-profile, which adds<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 upstream<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0and downstream m=
asks that OPOT requires.____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Thanks to Alejan=
dro for suggesting these updates.____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0This fixes the l=
ast =E2=80=9Cknown issue=E2=80=9D in<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0draft-ietf-sfc-p=
roof-of-transit. It would be great if you<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 could give<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0the document ano=
ther careful read through.<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Are we ready for=
 WGLC?____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Thanks, Frank___=
_<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*From:* Alejandr=
o Aguado FI &lt;<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.=
aguadom@fi.upm.es</a> <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es" tar=
get=3D"_blank">a.aguadom@fi.upm.es</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:a..aguadom@=
fi.upm.es" target=3D"_blank">a..aguadom@fi.upm.es</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a>=
 &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.agua=
dom@fi.upm.es</a>&gt;&gt;&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Sent:* Donnerst=
ag, 12. September 2019 15:40<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*To:* Diego R. L=
opez &lt;<a href=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_blank">=
diego.r.lopez@telefonica.com</a> <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:diego.r.lopez@telefonica=
.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.r.lop=
ez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<b=
r>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@=
telefonica.com</a><br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.r.lop=
ez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;&g=
t;&gt;; Carlos Pignataro (cpignata)<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=3D"m=
ailto:cpignata@cisco.com" target=3D"_blank">cpignata@cisco.com</a> &lt;mail=
to:<a href=3D"mailto:cpignata@cisco.com" target=3D"_blank">cpignata@cisco.c=
om</a>&gt; <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:cpignata@cisco.com" targ=
et=3D"_blank">cpignata@cisco.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:cpignata@ci=
sco.com" target=3D"_blank">cpignata@cisco.com</a> &lt;mailto:<a href=3D"mai=
lto:cpignata@cisco." target=3D"_blank">cpignata@cisco.</a>.com&gt;&gt;&gt;;=
 Frank<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Brockners<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0(fbrockne) &lt;<=
a href=3D"mailto:fbrockne@cisco.com" target=3D"_blank">fbrockne@cisco.com</=
a> &lt;mailto:<a href=3D"mailto:fbrockne@cisco.com" target=3D"_blank">fbroc=
kne@cisco.com</a>&gt; <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:fbrockne@cisco.com" targ=
et=3D"_blank">fbrockne@cisco.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:fbrockne@ci=
sco.com" target=3D"_blank">fbrockne@cisco.com</a> &lt;mailto:<a href=3D"mai=
lto:fbrockne@cisco.com" target=3D"_blank">fbrockne@cisco.com</a>&gt;&gt;&gt=
;;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0ALEJANDRO AGUADO=
 MARTIN<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;<a href=3D"mailto:alejandro.aguadoma=
rtin.ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin.ext@telef=
onica.com</a> <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:alejandro.aguadomartin.e=
xt@telefonica.com" target=3D"_blank">alejandro.aguadomartin.ext@telefonica.=
com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejandro.a=
guadomartin.ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin.ex=
t@telefonica.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_blank">a=
lejandro.aguadomartin.ext@telefonica.com</a><br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejandro.a=
guadomartin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin..=
ext@telefonica.com</a>&gt;&gt;&gt;; Shwetha<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Bhandari (shweth=
ab) &lt;<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@ci=
sco.com</a> <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:shwethab@cisco.com" targ=
et=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:shwethab@ci=
sco.com" target=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com</a> &=
lt;mailto:<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@=
cisco.com</a>&gt;&gt;&gt;;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Tal Mizrahi &lt;<a href=3D"mailto:tal.mi=
zrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a> <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:tal.mizrahi.phd@gmail.co=
m" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mizrahi=
.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:tal.mizrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@g=
mail.com</a><br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mizrahi=
.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;&gt;&gt;=
<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Cc:* <a href=3D=
"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a href=
=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt; &lt;mailto:=
<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:sfc@ietf.or=
g" target=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a href=3D"mailto:sfc@ietf=
.org" target=3D"_blank">sfc@ietf.org</a>&gt;&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Subject:* Re: P=
oT review/comments____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Hi Shwetha,____<=
br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Yes, I think it =
is a good idea. From your points, the second<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 one is<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0a bit confusing =
to me... But I do not fully remember how the<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 model<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0was structured, =
so I need to revise the document.____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Give me a day or=
 two to explore again the model, and either we<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0exchange few ema=
ils with proposals for the extension, or we can<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0organise a quick=
 call during next week to close a final<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 proposal to<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0share with other=
 contributors.____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Thanks!____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Best,____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Alejandro____<br=
>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0El 12 de septiem=
bre de 2019 a las 8:52:44, Shwetha Bhandari<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0(shwethab) (<a h=
ref=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com</a> =
&lt;mailto:<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab=
@cisco.com</a>&gt; <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:shwethab@cisco.com" targ=
et=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:shwethab@ci=
sco.com" target=3D"_blank">shwethab@cisco.com</a> &lt;mailto:<a href=3D"mai=
lto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com</a>&gt;&gt;)<b=
r>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0escribi=C3=B3:__=
__<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Hi Alejandro, Di=
ego,____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Since you added =
extension to do OPoT, should we extend the<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 model in<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0draft-ietf-sfc-p=
roof-of-transit to enable OPoT and any<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 parameters<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0required for it=
=C2=A0 shared masks per link. If yes my proposal<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 will be<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0to:____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0 1. Augment exis=
ting pot-profile with fields to Enable OPoT<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 and a<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0ci=
pher scheme if needed.____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0 2. Separate con=
tainer in the model to define a map of (Node<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0li=
nk/interface, mask) to distribute pair wise masks. For<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 e.g.<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0No=
de link/interface identifier can be UUID as defined in<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 rfc8348<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Or=
____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0 3. Masks can be=
 part of pot-profile.____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0What do you thin=
k about revising the model with this?____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Thanks,____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Shwetha____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*From: *&quot;Fr=
ank Brockners (fbrockne)&quot; &lt;<a href=3D"mailto:fbrockne@cisco.com" ta=
rget=3D"_blank">fbrockne@cisco.com</a> <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:fbrockne@cisco.com" targ=
et=3D"_blank">fbrockne@cisco.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:fbrockne@ci=
sco.com" target=3D"_blank">fbrockne@cisco.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:fbrockne@cisco.com" target=3D"_blank">fbrockne@cisco.com</a> &=
lt;mailto:<a href=3D"mailto:fbrockne@cisco.com" target=3D"_blank">fbrockne@=
cisco.com</a>&gt;&gt;&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Date: *Wednesda=
y, September 11, 2019 at 2:34 PM<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*To: *ALEJANDRO =
AGUADO MARTIN<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=3D"m=
ailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_blank">alejandr=
o.aguadomartin.ext@telefonica.com</a> <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:alejandro.aguadomartin.e=
xt@telefonica.com" target=3D"_blank">alejandro.aguadomartin.ext@telefonica.=
com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejandro.a=
guadomartin.ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin.ex=
t@telefonica.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_blank">a=
lejandro.aguadomartin.ext@telefonica.com</a><br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejandro.a=
guadomartin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin..=
ext@telefonica.com</a>&gt;&gt;&gt;, &quot;Diego R.<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Lopez&quot; &lt;=
<a href=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_blank">diego.r.l=
opez@telefonica.com</a> <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:diego.r.lopez@telefonica=
.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.r.lop=
ez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<b=
r>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:diego.r..lopez@telefonica.com" target=3D"_blank">diego.r..lope=
z@telefonica.com</a><br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.r..lo=
pez@telefonica.com" target=3D"_blank">diego.r..lopez@telefonica.com</a>&gt;=
&gt;&gt;, Carlos Pignataro<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;cpignata@cis=
co..com &lt;mailto:<a href=3D"mailto:cpignata@cisco.com" target=3D"_blank">=
cpignata@cisco.com</a><br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:cpignata@ci=
sco.com" target=3D"_blank">cpignata@cisco.com</a>&gt;&gt;&gt;, Shwetha bhan=
dari<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=3D"m=
ailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com</a> &lt;mail=
to:<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.c=
om</a>&gt; <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:shwethab@cisco.com" targ=
et=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:shwethab@ci=
sco.com" target=3D"_blank">shwethab@cisco.com</a> &lt;mailto:<a href=3D"mai=
lto:shwethab@cisco." target=3D"_blank">shwethab@cisco.</a>.com&gt;&gt;&gt;,=
 Tal <br>
&gt; &gt;&gt;&gt;&gt; Mizrahi<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=3D"m=
ailto:tal.mizrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.co=
m</a> &lt;mailto:<a href=3D"mailto:tal.mizrahi.phd@gmail.com" target=3D"_bl=
ank">tal.mizrahi.phd@gmail.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mizrahi=
.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mizrahi=
.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a> <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:tal.mizrahi.phd@gmail.co=
m" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;&gt;&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Cc: *&quot;<a h=
ref=3D"mailto:a..aguadom@fi.upm.es" target=3D"_blank">a..aguadom@fi.upm.es<=
/a> &lt;mailto:<a href=3D"mailto:a..aguadom@fi.upm.es" target=3D"_blank">a.=
.aguadom@fi.upm.es</a>&gt; <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:a..aguadom@fi.upm.es" ta=
rget=3D"_blank">a..aguadom@fi.upm.es</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:a.aguadom@f=
i.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a> &lt;mailto:<a href=3D"m=
ailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a>&gt;&gt=
;&quot;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=3D"m=
ailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a> &lt;ma=
ilto:<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.=
upm.es</a>&gt; <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es" tar=
get=3D"_blank">a.aguadom@fi.upm.es</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:a.aguadom@f=
i.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a> &lt;mailto:<a href=3D"m=
ailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a>&gt;&gt=
;&gt;,<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &quot;<a href=3D"mailto:sfc@ietf.org" ta=
rget=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a href=3D"mailto:sfc@ietf.org"=
 target=3D"_blank">sfc@ietf.org</a>&gt; &lt;mailto:<a href=3D"mailto:sfc@ie=
tf.org" target=3D"_blank">sfc@ietf.org</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a=
 href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt;&gt;&qu=
ot; &lt;<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a> =
<br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:sfc@ietf.org" target=3D"=
_blank">sfc@ietf.org</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:sfc@ietf.or=
g" target=3D"_blank">sfc@ietf.org</a>&gt; &lt;mailto:<a href=3D"mailto:sfc@=
ietf.org" target=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a href=3D"mailto:s=
fc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt;&gt;&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Subject: *RE: P=
oT review/comments____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Hi Alejandro,___=
_<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Thanks again for=
 the review. Your comments have been<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 integrated into<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0draft-ietf-sfc-p=
roof-of-transit-03 which just got posted.____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Cheers, Frank___=
_<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*From:*Frank Bro=
ckners (fbrockne)<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Sent:* Montag, =
27. Mai 2019 18:18<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*To:* ALEJANDRO =
AGUADO MARTIN<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=3D"m=
ailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_blank">alejandr=
o.aguadomartin.ext@telefonica.com</a> <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:alejandro.aguadomartin.e=
xt@telefonica.com" target=3D"_blank">alejandro.aguadomartin.ext@telefonica.=
com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejandro.a=
guadomartin.ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin.ex=
t@telefonica.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_blank">a=
lejandro.aguadomartin.ext@telefonica.com</a><br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejandro.a=
guadomartin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin..=
ext@telefonica.com</a>&gt;&gt;&gt;; Diego R. Lopez<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=3D"m=
ailto:diego.r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@telefon=
ica.com</a> <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:diego.r.lopez@telefonica=
.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.r.lop=
ez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<b=
r>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@=
telefonica.com</a><br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.r.lop=
ez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;&g=
t;&gt;; Carlos Pignataro (cpignata)<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=3D"m=
ailto:cpignata@cisco.com" target=3D"_blank">cpignata@cisco.com</a> &lt;mail=
to:<a href=3D"mailto:cpignata@cisco.com" target=3D"_blank">cpignata@cisco.c=
om</a>&gt; <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:cpignata@cisco.com" targ=
et=3D"_blank">cpignata@cisco.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:cpignata@ci=
sco.com" target=3D"_blank">cpignata@cisco.com</a> &lt;mailto:<a href=3D"mai=
lto:cpignata@cisco." target=3D"_blank">cpignata@cisco.</a>.com&gt;&gt;&gt;;=
 Shwetha<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Bhandari<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0(shwethab) &lt;<=
a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com</=
a> &lt;mailto:<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwet=
hab@cisco.com</a>&gt; <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:shwethab@cisco.com" targ=
et=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:shwethab@ci=
sco.com" target=3D"_blank">shwethab@cisco.com</a> &lt;mailto:<a href=3D"mai=
lto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com</a>&gt;&gt;&gt=
;; Tal<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Mizrahi &lt;<a h=
ref=3D"mailto:tal.mizrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@=
gmail.com</a> <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:tal.mizrahi.phd@gmail.co=
m" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mizrahi=
.phd@gmail." target=3D"_blank">tal.mizrahi.phd@gmail.</a>.com&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mizrahi=
.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a> <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:tal.mizrahi.phd@gmail.co=
m" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;&gt;&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Cc:* <a href=3D=
"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a> &lt;=
mailto:<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@f=
i.upm.es</a>&gt; <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es" tar=
get=3D"_blank">a.aguadom@fi.upm.es</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:a.aguadom@f=
i.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a> &lt;mailto:<a href=3D"m=
ailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a>&gt;&gt=
;;<br>
&gt; &gt;&gt;&gt;&gt; <a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc=
@ietf.org</a> &lt;mailto:<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">=
sfc@ietf.org</a>&gt; &lt;mailto:<a href=3D"mailto:sfc@ietf.org" target=3D"_=
blank">sfc@ietf.org</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a=
 href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt;&gt;<br=
>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Subject:* RE: P=
oT review/comments____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Hi Alejandro,___=
_<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Many thanks for =
the comments =E2=80=93 and sorry for the delay =E2=80=93<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0unfortunately yo=
ur email somehow got dropped from my todo list.<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Please see inlin=
e=E2=80=A6____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0(cc=E2=80=99ing =
the list as well).____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*From:*ALEJANDRO=
 AGUADO MARTIN<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=3D"m=
ailto:alejandro.aguadomartin..ext@telefonica.com" target=3D"_blank">alejand=
ro.aguadomartin..ext@telefonica.com</a> <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:alejandro.aguadomartin..=
ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin..ext@telefonic=
a.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejandro.a=
guadomartin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin..=
ext@telefonica.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_blank">a=
lejandro.aguadomartin.ext@telefonica.com</a><br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejandro.a=
guadomartin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin..=
ext@telefonica.com</a>&gt;&gt;&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Sent:* Montag, =
15. April 2019 17:27<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*To:* Diego R. L=
opez &lt;<a href=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_blank">=
diego.r.lopez@telefonica.com</a> <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:diego.r.lopez@telefonica=
.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.r.lop=
ez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<b=
r>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@=
telefonica.com</a><br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.r.lop=
ez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;&g=
t;&gt;; Carlos Pignataro (cpignata)<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=3D"m=
ailto:cpignata@cisco.com" target=3D"_blank">cpignata@cisco.com</a> &lt;mail=
to:<a href=3D"mailto:cpignata@cisco.com" target=3D"_blank">cpignata@cisco.c=
om</a>&gt; <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:cpignata@cisco.com" targ=
et=3D"_blank">cpignata@cisco.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:cpignata@ci=
sco.com" target=3D"_blank">cpignata@cisco.com</a> &lt;mailto:<a href=3D"mai=
lto:cpignata@cisco." target=3D"_blank">cpignata@cisco.</a>.com&gt;&gt;&gt;;=
 Frank<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Brockners<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0(fbrockne) &lt;<=
a href=3D"mailto:fbrockne@cisco.com" target=3D"_blank">fbrockne@cisco.com</=
a> &lt;mailto:<a href=3D"mailto:fbrockne@cisco.com" target=3D"_blank">fbroc=
kne@cisco.com</a>&gt; <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:fbrockne@cisco.com" targ=
et=3D"_blank">fbrockne@cisco.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:fbrockne@ci=
sco.com" target=3D"_blank">fbrockne@cisco.com</a> &lt;mailto:<a href=3D"mai=
lto:fbrockne@cisco.com" target=3D"_blank">fbrockne@cisco.com</a>&gt;&gt;&gt=
;; Shwetha<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Bhandari (shweth=
ab) &lt;<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@ci=
sco.com</a> <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:shwethab@cisco.com" targ=
et=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:shwethab@ci=
sco.com" target=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com</a> &=
lt;mailto:<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@=
cisco.com</a>&gt;&gt;&gt;;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Tal Mizrahi &lt;<a href=3D"mailto:tal.mi=
zrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a> <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:tal.mizrahi.phd@gmail.co=
m" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mizrahi=
.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:<a hr=
ef=3D"mailto:tal.mizrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@g=
mail.com</a><br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mizrahi=
.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;&gt;&gt;=
<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Cc:* <a href=3D=
"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a> &lt;=
mailto:<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@f=
i.upm.es</a>&gt; <br>
&gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es" tar=
get=3D"_blank">a.aguadom@fi.upm.es</a>&gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:a.aguadom@f=
i.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a> &lt;mailto:<a href=3D"m=
ailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a>&gt;&gt=
;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Subject:* PoT r=
eview/comments____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Dear all,____<br=
>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0I gave a quick r=
eview to the PoT document. Some comments:____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0- I read =E2=80=
=9CThe non-constant coefficients are used to <br>
&gt; &gt;&gt;&gt;&gt; generate the<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Lagrange Polynom=
ial Constants (LPC).=E2=80=9D As far as I<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 understood, the<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0points assigned =
to each node (Xi) are the ones used for<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 generating<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0the LPCi, aren=
=E2=80=99t they?____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/=E2=80=A6FB: G=
ood catch. The LPCs are of course computed using (x_i,<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0y_i)./*____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0- If we go for i=
ncluding the YANG in the current document<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 (which I<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0agree), paramete=
rs should be described before the yang<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 definition,<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0and maybe it wou=
ld be helpful to have the yang tree (see the<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 current<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0version attached=
).____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/=E2=80=A6FB: T=
hanks. IMHO it makes sense to keep the YANG model <br>
&gt; &gt;&gt;&gt;&gt; in the<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0current doc, giv=
en that the model and the description go <br>
&gt; &gt;&gt;&gt;&gt; hand in<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0hand. We can of =
course also include the yang tree to make<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 reading<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0easier. This is =
consistent with other documents which<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 specify YANG<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0models./*____<br=
>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0- I include in t=
he attached file few questions about naming<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 of some<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0parameters.____<=
br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*//*____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/=E2=80=A6FB:<b=
r>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0- naming F_i(x_i=
, y_i) =E2=80=93 I agree that a better name could be<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 used.<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0The only potenti=
al concern would be that the open source<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0implementation i=
n OpenDaylight uses this naming =E2=80=93 changing<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 it might<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0lead to confusio=
n.. We can start with adding a comment to make<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0things clearer./=
*____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*//*____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/- secret key =
=E2=80=93 this is the constant part of the first<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 polynomial<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0which serves as =
the secret =E2=80=93 and which is re-retrieved.<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Again, we<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0can update the d=
escription to make things clearer./*____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*//*____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/- size of the =
random number: This is unrelated to OPOT.<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 The random<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0number is to uni=
quely identify a packet. There is a trade-off<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0between the size=
 of the random number and how often you need to<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0re-key your syst=
em. At high speeds, the random number =E2=80=93 which<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0identifies a par=
ticular packet =E2=80=93 is used up quite quickly if<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 it is<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0only 32-bit wide=
. See section 4<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; <br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 /*<a href=3D"https://tools=
.ietf.org/html/draft-ietf-sfc-proof-of-transit-02#section-4____" rel=3D"nor=
eferrer" target=3D"_blank">https://tools.ietf.org/html/draft-ietf-sfc-proof=
-of-transit-02#section-4____</a><br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*//*____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/- number of pr=
ofiles: For a deployment which is expected<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 to renew<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0keys every now a=
nd then (e.g. you run with 32-bit random<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 numbers at<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0reasonably high =
speeds), you need at least 2 profiles =E2=80=93 an<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 active<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0one and one that=
 you can activate once you run out of random<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 numbers<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0(which is what t=
he encapsulating node would decide).. /*____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0- I have checked=
 some of the existing YANG files within the<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 IETF to<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0see in which it =
would be helpful to include. From the (not<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 so) old<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0OpenFlow, I assu=
me that one match is necessary (for <br>
&gt; &gt;&gt;&gt;&gt; identify the<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0iOAM/PoT header)=
 whilst the source node can use any existing<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 match<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0field to identif=
y packets where to apply the PoT scheme. In<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 terms of<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0actions, I would=
 say that two may be required: for any node, an<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0update-pot is ne=
cessary, while the verifier would need a<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 verify-pot<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0type of action, =
that would ideally either remove the header<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 or drop<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0the packet if fa=
ils (I do not know if you are thinking in more<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0complex scenario=
s).____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*//*____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/=E2=80=A6FB: F=
rom an OF perspective, that sounds feasible.. That<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 said, we<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0probably want to=
 avoid making the spec specific to a<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 technology like<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0OF, hence would =
suggest that we don=E2=80=99t specify such a <br>
&gt; &gt;&gt;&gt;&gt; behavior as<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0part of this doc=
ument./*____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*//*____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0- For this last =
point, I have seen the definitions within<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0draft-asechoud-r=
tgwg-qos-model-08, where matched could map<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 (if I am<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0not wrong) to cl=
assifiers/filters, and actions to actions. I<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 send<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0you the models i=
n a zip file. In this sense the model to be<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 defined<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0in the PoT shall=
 be an augment of the models defined in that<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0document. I have=
 not done a very deep revision on the model,<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 but I<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0think it could f=
it there. If you have check this or other<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 models,<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0let me know so I=
 could also help.____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*//*____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/=E2=80=A6FB: P=
er my note above: In order to keep POT generic and<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 not link<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0it to a particul=
ar classification mechanism, I=E2=80=99d prefer to<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 keep the<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0classification q=
uestion as out of scope for the current<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 document.<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0That way it can =
also apply to technologies which come with<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 their own<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0way to classify =
=E2=80=93 and which might fully decouple the tunneling<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0aspects from the=
 classification aspects. /*____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Thanks a lot and=
 sorry for such long email.____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/..FB: Thanks a=
gain for all your comments. We=E2=80=99ll get them<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 included<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0in the next revi=
sion. /*____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*//*____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/Cheers, Frank/=
*____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Best,____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Alejandro____<br=
>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; <br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 --------------------------=
----------------------------------------------<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Este mensaje y s=
us adjuntos se dirigen exclusivamente a su<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0destinatario, pu=
ede contener informaci=C3=B3n privilegiada o<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 confidencial<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0y es para uso ex=
clusivo de la persona o entidad de destino.<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Si no es<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0usted. el destin=
atario indicado, queda notificado de que la<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 lectura,<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0utilizaci=C3=B3n=
, divulgaci=C3=B3n y/o copia sin autorizaci=C3=B3n puede estar<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0prohibida en vir=
tud de la legislaci=C3=B3n vigente. Si ha<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 recibido este<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0mensaje por erro=
r, le rogamos que nos lo comunique<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 inmediatamente<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0por esta misma v=
=C3=ADa y proceda a su destrucci=C3=B3n.<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0The information =
contained in this transmission is <br>
&gt; &gt;&gt;&gt;&gt; privileged and<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0confidential inf=
ormation intended only for the use of the<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 individual<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0or entity named =
above. If the reader of this message is not the<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0intended recipie=
nt, you are hereby notified that any<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 dissemination,<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0distribution or =
copying of this communication is strictly<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0prohibited. If y=
ou have received this transmission in error,<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 do not<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0read it. Please =
immediately reply to the sender that you have<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0received this co=
mmunication in error and then delete it.<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Esta mensagem e =
seus anexos se dirigem exclusivamente ao seu<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0destinat=C3=A1ri=
o, pode conter informa=C3=A7=C3=A3o privilegiada ou<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 confidencial e<br>
&gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0=C3=A9 para uso =
exclusivo da pessoa ou entidade de destino. Se n=C3=A3o =C3=A9<br>
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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Wed, 1 Apr 2020 15:45:28 -0700
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Hi Frank, et al.,
thank you for the updates. I have a couple of questions and appreciate if
you and the WG consider them:

   - in the Introduction, the term "in-situ" is explained as follows:

   The term "in-situ" refers to the fact
   that the OAM data is added to the data packets rather than is being
   sent within packets specifically dedicated to OAM.

That is reasonable since the draft only references draft-ietf-ippm-ioam-dat=
a
<https://datatracker.ietf.org/doc/draft-ietf-ippm-ioam-data/>. As those,
following work on iOAM in IPPM WG, know several new iOAM behaviors,
e.g., Direct
Export
<https://datatracker.ietf.org/doc/draft-ietf-ippm-ioam-direct-export/>,
Loopback <https://datatracker.ietf.org/doc/draft-ietf-ippm-ioam-flags/> and
Active, have been defined in new IPPM WG drafts. Are these behaviors
applicable to iOAM in SFC NSH?


   - the second question is related to the discussion of the iOAM
   encapsulation in NSH. I couldn't find explicitly stated requirements tha=
t
   are based on quantitative metrics. The text refers to "large networks",
   "can grow quite large" and alike. Do we have an example of a large SFC
   network? And if the size of MD Type 2 meta-data might be limiting in som=
e
   scenarios, iOAM now has defined the Direct Export mode that supports the
   collection of any practical information from each iOAM node. I think tha=
t
   the use of the Direct Export or other methods that collect iOAM informat=
ion
   in a dedicated packet can be recommended. As a result, the choice of the
   iOAM encapsulation in NSH can be re-considered.


Regards,
Greg

On Thu, Mar 19, 2020 at 6:49 AM Frank Brockners (fbrockne) <fbrockne=3D
40cisco.com@dmarc.ietf.org> wrote:

> Quick update: I've just posted a new revision of draft-ietf-sfc-ioam-nsh.
>
> This update includes editorial fixes only - mainly an alignment to the
> nomenclature used in draft-ietf-ippm-ioam-data.
>
> Are there any further comments on this draft? Are we ready to move to WG
> LC?
>
> Thanks, Frank
>
> > -----Original Message-----
> > From: sfc <sfc-bounces@ietf.org> On Behalf Of internet-drafts@ietf.org
> > Sent: Donnerstag, 19. M=C3=A4rz 2020 14:39
> > To: i-d-announce@ietf.org
> > Cc: sfc@ietf.org
> > Subject: [sfc] I-D Action: draft-ietf-sfc-ioam-nsh-03.txt
> >
> >
> > A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> > This draft is a work item of the Service Function Chaining WG of the
> IETF.
> >
> >         Title           : Network Service Header (NSH) Encapsulation fo=
r
> In-situ OAM
> > (IOAM) Data
> >         Authors         : Frank Brockners
> >                           Shwetha Bhandari
> >       Filename        : draft-ietf-sfc-ioam-nsh-03.txt
> >       Pages           : 9
> >       Date            : 2020-03-19
> >
> > Abstract:
> >    In-situ Operations, Administration, and Maintenance (IOAM) records
> >    operational and telemetry information in the packet while the packet
> >    traverses a path between two points in the network.  This document
> >    outlines how IOAM data fields are encapsulated in the Network Servic=
e
> >    Header (NSH).
> >
> >
> > The IETF datatracker status page for this draft is:
> > https://datatracker.ietf.org/doc/draft-ietf-sfc-ioam-nsh/
> >
> > There are also htmlized versions available at:
> > https://tools.ietf.org/html/draft-ietf-sfc-ioam-nsh-03
> > https://datatracker.ietf.org/doc/html/draft-ietf-sfc-ioam-nsh-03
> >
> > A diff from the previous version is available at:
> > https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-sfc-ioam-nsh-03
> >
> >
> > Please note that it may take a couple of minutes from the time of
> submission
> > until the htmlized version and diff are available at tools.ietf.org.
> >
> > Internet-Drafts are also available by anonymous FTP at:
> > ftp://ftp.ietf.org/internet-drafts/
> >
> >
> > _______________________________________________
> > sfc mailing list
> > sfc@ietf.org
> > https://www.ietf.org/mailman/listinfo/sfc
>
> _______________________________________________
> sfc mailing list
> sfc@ietf.org
> https://www.ietf.org/mailman/listinfo/sfc
>

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<div dir=3D"ltr">Hi Frank, et al.,<div>thank you for the updates. I have a =
couple of questions and appreciate if you and the WG consider them:</div><d=
iv><ul><li>in the Introduction, the term &quot;in-situ&quot; is explained a=
s follows:</li></ul><blockquote style=3D"margin:0 0 0 40px;border:none;padd=
ing:0px"><div>=C2=A0 =C2=A0The term &quot;in-situ&quot; refers to the fact<=
br>=C2=A0 =C2=A0that the OAM data is added to the data packets rather than =
is being<br>=C2=A0 =C2=A0sent within packets specifically dedicated to OAM.=
<br></div></blockquote><blockquote style=3D"margin:0 0 0 40px;border:none;p=
adding:0px"><div>That is reasonable since the draft only references <a href=
=3D"https://datatracker.ietf.org/doc/draft-ietf-ippm-ioam-data/">draft-ietf=
-ippm-ioam-data</a>. As those, following work on iOAM in IPPM WG, know seve=
ral new iOAM behaviors, e.g.,=C2=A0<a href=3D"https://datatracker.ietf.org/=
doc/draft-ietf-ippm-ioam-direct-export/">Direct Export</a>, <a href=3D"http=
s://datatracker.ietf.org/doc/draft-ietf-ippm-ioam-flags/">Loopback</a>=C2=
=A0and Active, have been defined in new IPPM WG drafts. Are these behaviors=
 applicable to iOAM in SFC NSH?</div></blockquote><div><ul><li>the second q=
uestion is related to the discussion of the iOAM encapsulation in NSH. I co=
uldn&#39;t find explicitly stated requirements that are based on quantitati=
ve=C2=A0metrics. The text refers to &quot;large networks&quot;, &quot;can g=
row quite large&quot; and alike. Do we have an example of a large SFC netwo=
rk? And if the size of MD Type 2 meta-data might be limiting in some scenar=
ios, iOAM now has defined the Direct Export mode that supports the collecti=
on of any practical information from each iOAM node. I think that the use o=
f the Direct Export or other methods that collect iOAM information in a ded=
icated packet can be recommended. As a result, the choice of the iOAM encap=
sulation in NSH can be re-considered.</li></ul></div></div><div><br></div><=
div>Regards,</div><div>Greg</div></div><br><div class=3D"gmail_quote"><div =
dir=3D"ltr" class=3D"gmail_attr">On Thu, Mar 19, 2020 at 6:49 AM Frank Broc=
kners (fbrockne) &lt;fbrockne=3D<a href=3D"mailto:40cisco.com@dmarc.ietf.or=
g">40cisco.com@dmarc.ietf.org</a>&gt; wrote:<br></div><blockquote class=3D"=
gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(20=
4,204,204);padding-left:1ex">Quick update: I&#39;ve just posted a new revis=
ion of draft-ietf-sfc-ioam-nsh.<br>
<br>
This update includes editorial fixes only - mainly an alignment to the nome=
nclature used in draft-ietf-ippm-ioam-data.<br>
<br>
Are there any further comments on this draft? Are we ready to move to WG LC=
?<br>
<br>
Thanks, Frank<br>
<br>
&gt; -----Original Message-----<br>
&gt; From: sfc &lt;<a href=3D"mailto:sfc-bounces@ietf.org" target=3D"_blank=
">sfc-bounces@ietf.org</a>&gt; On Behalf Of <a href=3D"mailto:internet-draf=
ts@ietf.org" target=3D"_blank">internet-drafts@ietf.org</a><br>
&gt; Sent: Donnerstag, 19. M=C3=A4rz 2020 14:39<br>
&gt; To: <a href=3D"mailto:i-d-announce@ietf.org" target=3D"_blank">i-d-ann=
ounce@ietf.org</a><br>
&gt; Cc: <a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a>=
<br>
&gt; Subject: [sfc] I-D Action: draft-ietf-sfc-ioam-nsh-03.txt<br>
&gt; <br>
&gt; <br>
&gt; A New Internet-Draft is available from the on-line Internet-Drafts dir=
ectories.<br>
&gt; This draft is a work item of the Service Function Chaining WG of the I=
ETF.<br>
&gt; <br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Title=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0: Network Service Header (NSH) Encapsulation for In-situ OAM<br>
&gt; (IOAM) Data<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Authors=C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0: Frank Brockners<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0Shwetha Bhandari<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0Filename=C2=A0 =C2=A0 =C2=A0 =C2=A0 : draft-=
ietf-sfc-ioam-nsh-03.txt<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0Pages=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0: 9<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0Date=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 : 2020-03-19<br>
&gt; <br>
&gt; Abstract:<br>
&gt;=C2=A0 =C2=A0 In-situ Operations, Administration, and Maintenance (IOAM=
) records<br>
&gt;=C2=A0 =C2=A0 operational and telemetry information in the packet while=
 the packet<br>
&gt;=C2=A0 =C2=A0 traverses a path between two points in the network.=C2=A0=
 This document<br>
&gt;=C2=A0 =C2=A0 outlines how IOAM data fields are encapsulated in the Net=
work Service<br>
&gt;=C2=A0 =C2=A0 Header (NSH).<br>
&gt; <br>
&gt; <br>
&gt; The IETF datatracker status page for this draft is:<br>
&gt; <a href=3D"https://datatracker.ietf.org/doc/draft-ietf-sfc-ioam-nsh/" =
rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.org/doc/draft=
-ietf-sfc-ioam-nsh/</a><br>
&gt; <br>
&gt; There are also htmlized versions available at:<br>
&gt; <a href=3D"https://tools.ietf.org/html/draft-ietf-sfc-ioam-nsh-03" rel=
=3D"noreferrer" target=3D"_blank">https://tools.ietf.org/html/draft-ietf-sf=
c-ioam-nsh-03</a><br>
&gt; <a href=3D"https://datatracker.ietf.org/doc/html/draft-ietf-sfc-ioam-n=
sh-03" rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.org/do=
c/html/draft-ietf-sfc-ioam-nsh-03</a><br>
&gt; <br>
&gt; A diff from the previous version is available at:<br>
&gt; <a href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-sfc-ioam-nsh=
-03" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/rfcdiff?url2=
=3Ddraft-ietf-sfc-ioam-nsh-03</a><br>
&gt; <br>
&gt; <br>
&gt; Please note that it may take a couple of minutes from the time of subm=
ission<br>
&gt; until the htmlized version and diff are available at <a href=3D"http:/=
/tools.ietf.org" rel=3D"noreferrer" target=3D"_blank">tools.ietf.org</a>.<b=
r>
&gt; <br>
&gt; Internet-Drafts are also available by anonymous FTP at:<br>
&gt; <a href=3D"ftp://ftp.ietf.org/internet-drafts/" rel=3D"noreferrer" tar=
get=3D"_blank">ftp://ftp.ietf.org/internet-drafts/</a><br>
&gt; <br>
&gt; <br>
&gt; _______________________________________________<br>
&gt; sfc mailing list<br>
&gt; <a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a><br>
&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/sfc" rel=3D"noreferre=
r" target=3D"_blank">https://www.ietf.org/mailman/listinfo/sfc</a><br>
<br>
_______________________________________________<br>
sfc mailing list<br>
<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/sfc" rel=3D"noreferrer" ta=
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</blockquote></div>

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Thread-Topic: [sfc] draft-ietf-sfc-proof-of-transit-04 ready for WGLC? (was RE: PoT review/comments)
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To: Greg Mirsky <gregimirsky@gmail.com>
CC: "Joel M. Halpern" <jmh@joelhalpern.com>, "sfc@ietf.org" <sfc@ietf.org>
Thread-Topic: [sfc] draft-ietf-sfc-proof-of-transit-04 ready for WGLC? (was RE: PoT review/comments)
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Subject: Re: [sfc] draft-ietf-sfc-proof-of-transit-04 ready for WGLC? (was RE: PoT review/comments)
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To: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
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Subject: Re: [sfc] draft-ietf-sfc-proof-of-transit-04 ready for WGLC? (was RE: PoT review/comments)
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Fair question.  No, I do not have any pointers.  The rule of thumb I am 
following (and if the WG disagrees, the WG carriees the day) is that the 
specification has to be implementable.  In the case of IP over Foo, we 
have understood that we will put it in a separate spec.  And people know 
to look for that spec.  Arguably, the informative reference you propose 
provides the "people know to look" mechanism.  At which point it is a 
judgment call.
And I admit, part of my reasoning on the judgment call is that we said 
this is an SFC document, and the normative header for SFC is NSH.  Even 
if other working groups are also doing other things.

Trying to find the right balance (because the suitability for other 
things is important) we said something like:
     When used in conjunct with NSH (RFC 8300), the PoT MUST be carried 
as specified in ...
And made the reference normative.   Essentially a conditional MUST, 
which is allowed my the rules.

Yours,
Joel

On 4/1/2020 6:50 PM, Carlos Pignataro (cpignata) wrote:
> Same here, Joel, I am happy with either normative or informative.
> 
> However, mostly for my understanding and beyond this specific draft:
> The MTI concept seems does not seem to be yes/no binary. I’ve never fully understood MTI as a requirement beyond security features and professional judgement. For example, RFC 8200 does not say how to carry IPv6 over any layer-2 — not ethernet, not PPP. RFC 8300 does not explain how to carry (i.e., transportation encapsulation) NSH over anything.
> 
> MTI makes sense to me within a given layer — but it is less clear to me how far down the layers MTI really applies. For a spec defining how to encapsulate something, sure. For a spec defiling information elements at a given Layer that need to interoperate within themselves regardless the encap, less clear to me.
> 
> Also, MTI seems to be better define within security features, less so as a general criteria for spec completeness.
> 
> Do you have any pointers or normative definitions?
> 
> Thanks,
> 
> Carlos.
> 
>> 2020/04/01 午後3:30、Joel M. Halpern <jmh@joelhalpern.com>のメール:
>>
>> To be clear up front, I can live with an informative reference from sfc-proof-of-transit to sfc-ioam-nsh.
>>
>> However, it seems to me that as a Proposed Standard, we are expected to define an interoperable and implementable protocol.  Without a normative reference to some encoding (and sfc-ioam-nsh does seem the obvious one to reference) we do not seem to have a full PS.  That is not to say that there can not be other encodings.  But NSH is the SFC agreed header format.  So for an SFC document, this seems natural as the MTI.
>>
>> Yours,
>> Joel
>>
>> On 4/1/2020 3:16 PM, Carlos Pignataro (cpignata) wrote:
>>> Dear Greg,
>>>> 2020/04/01 午後2:59、Greg Mirsky <gregimirsky@gmail.com>のメール:
>>>>
>>>> Dear All,
>>>> I agree with Joel that the reference in draft-ietf-sfc-proof-of-transit to draft-ietf-ippm-ioam-data should be normative.
>>> Great. Everyone seems to be aligned on this point.
>>>> I also support the proposal to add in draft-ietf-sfc-proof-of-transit a normative reference to draft-ietf-sfc-ioam-nsh. SFC WG is working on defining SFC that is based on NSH (SFC NSH), and while SFC might be realized using other techniques, draft-ietf-sfc-ioam-nsh is, and likely will remain, the only document that is describing iOAM encapsulation in SFC NSH. Thus, I believe, for SFC WG, implementation of PoT based on iOAM requires implementation of iOAM encapsulation in SFC NSH, as defined in draft-ietf-sfc-ioam-nsh. Hence, the reference must be normative.
>>> This logic is flawed in the onset. The main point is that POT can be realized with a variety of transports and technologies and use-cases, one of which is SFC, and then further within SFC one of which is NSH.
>>> You seem to argue that NSH is somehow in practice the only SFC realization, and because of that the reference “must be normative”.
>>> I disagree with the premise, but regardless, it does not matter since POT applies to other non-SFC(-non-NSH) technologies. Therefore that since-then logic does not apply.
>>> Copying the very first sentence of the Abstract:
>>>     Several technologies such as Traffic Engineering (TE), Service
>>>     Function Chaining (SFC), and policy based routing [...]
>>> And now looking at this fragment, I am more convinced that this is one example and as such Informative.
>>> I would not object to Normative for the right reasons, but the reason above, in my mind, does not follow.
>>> Thanks,
>>> Carlos.
>>>>
>>>> Regards,
>>>> Greg
>>>>
>>>> On Tue, Mar 24, 2020 at 2:25 PM Joel M. Halpern <jmh@joelhalpern.com> wrote:
>>>> I think we all agree that draft-ietf-sfc-proof-of-transit requires the
>>>> normative reference to draft-ietf-ippm-ioam-data.
>>>>
>>>> Regarding a reference from draft-ietf-sfc-proof-of-transit to
>>>> draft-ietf-sfc-ioam-nsh, I think we agree that it is needed.  The
>>>> question then is normative or informative.  If we use the usual IETF
>>>> rule that there has to be a defined normative way to interoperably
>>>> implement a protocol spec (with other options allowed), my inclination
>>>> is that the reference should be normative.
>>>>
>>>> Regarding the informative reference in the other direction from
>>>> draft-ietf-sfc-ioam-nsh to draft-ietf-sfc-proof-of-transit, while I
>>>> personally like the idea, that is up to you / the working group.
>>>>
>>>> Yours,
>>>> Joel
>>>>
>>>> On 3/24/2020 5:20 PM, Carlos Pignataro (cpignata) wrote:
>>>>> Hi, Joel,
>>>>>
>>>>> The way in which the doc hierarchy and relationship is structure seems
>>>>> to support and potentially even require:
>>>>>
>>>>>  From draft-ietf-sfc-proof-of-transit:
>>>>> * A normative reference to [I-D.ietf-ippm-ioam-data], since PoT gives
>>>>> over IOAM explicitly, and that exists.
>>>>> * Optionally, an Informative reference to draft-ietf-sfc-ioam-nsh, since
>>>>> that’s really one out of many ways to carry IOAM over NSH, but separated
>>>>> by document indirection. This does not exist but can be added.
>>>>>
>>>>>   From draft-ietf-sfc-ioam-nsh:
>>>>> * Optionally, an Informative reference to
>>>>> draft-ietf-sfc-proof-of-transit, since that’s one out of many
>>>>> applications. This does not exist but can be added.
>>>>>
>>>>> Thoughts?
>>>>>
>>>>> Best,
>>>>>
>>>>> Carlos.
>>>>>
>>>>>> 2020/03/24 午後5:10、Joel M. Halpern <jmh@joelhalpern.com
>>>>>> <mailto:jmh@joelhalpern.com>>のメール:
>>>>>>
>>>>>> Carlos, it sounds like there should probably be a normative reference
>>>>>> from draft-ietf-sfc-proof of transit to draft-ietf-sfc-ioam-nsh?
>>>>>> Possibly in the same sentence that refers to draft-ietf-ippm-ioam-data?
>>>>>>
>>>>>> Yours,
>>>>>> Joel
>>>>>>
>>>>>> On 3/24/2020 4:54 PM, Carlos Pignataro (cpignata) wrote:
>>>>>>> Greg,
>>>>>>> The very first sentence of the PoT document reads:
>>>>>>>     Several technologies such as Traffic Engineering (TE), Service
>>>>>>>     Function Chaining (SFC), and policy based routing are used to steer
>>>>>>>     traffic through a specific, user-defined path.  This document defines
>>>>>>> Explaining how this document is applicable to various
>>>>>>> traffic-steering technologies.
>>>>>>> Section 3 then explains:
>>>>>>>     The POT information is encapsulated in packets as an IOAM Proof Of
>>>>>>>     Transit Option.  The details and format of the encapsulation and the
>>>>>>>     POT Option format are specified in [I-D.ietf-ippm-ioam-data].
>>>>>>> Which shows how to carry PoT in IOAM, with an appropriate pointer.
>>>>>>> Lastly, draft-ietf-sfc-ioam-nsh-03 defines IOAM over an NSH
>>>>>>> encapsulation.
>>>>>>> This arrangements maximizes specification modularity and
>>>>>>> portability/reusability.
>>>>>>> Best,
>>>>>>> Carlos.
>>>>>>>> 2020/03/24 午後4:48、Greg Mirsky <gregimirsky@gmail.com
>>>>>>>> <mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com>>のメール:
>>>>>>>>
>>>>>>>> Hi Joel,
>>>>>>>> thank you for the most expedient response. As I understand it, iOAM
>>>>>>>> Data draft describes the format of the informational element that
>>>>>>>> carries POT-related information but it does not define how the
>>>>>>>> element to be carried in case of NSH encapsulation. And that is what
>>>>>>>> I was asking, apologies for not being clear in my first note.
>>>>>>>>
>>>>>>>> Regards,
>>>>>>>> Greg
>>>>>>>>
>>>>>>>> On Tue, Mar 24, 2020 at 1:42 PM Joel M.. Halpern
>>>>>>>> <jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>
>>>>>>>> <mailto:jmh@joelhalpern.com>> wrote:
>>>>>>>>
>>>>>>>>     Regarding the information carriage, the PoT document points to the
>>>>>>>>     IOAM
>>>>>>>>     document.
>>>>>>>> https://tools.ietf.org/html/draft-ietf-ippm-ioam-data-08#section-4.5
>>>>>>>>     gives the format (and ways to have other formats if needed.)
>>>>>>>>
>>>>>>>>     Yours,
>>>>>>>>     Joel
>>>>>>>>
>>>>>>>>     On 3/24/2020 4:26 PM, Greg Mirsky wrote:
>>>>>>>>     > Hi Frank,
>>>>>>>>     > thank you for reminding us about this important work, indeed we
>>>>>>>>     should
>>>>>>>>     > complete it. I've reviewed the draft and have several questions.
>>>>>>>>     Please
>>>>>>>>     > kindly consider:
>>>>>>>>     >
>>>>>>>>     >   * I couldn't find information where, relative to NSH, RND and
>>>>>>>>     CML are
>>>>>>>>     >     transported
>>>>>>>>     >   * for YANG data models using "reference" is strongly
>>>>>>>>     encouraged as it
>>>>>>>>     >     provides a pointer to the specification. Since the POT data
>>>>>>>>     model is
>>>>>>>>     >     in the same document as the POT specification, listing the
>>>>>>>>     >     appropriate section should suffice
>>>>>>>>     >
>>>>>>>>     > Regards,
>>>>>>>>     > Greg
>>>>>>>>     >
>>>>>>>>     > On Thu, Mar 19, 2020 at 6:45 AM Frank Brockners (fbrockne)
>>>>>>>>     > <fbrockne=40cisco.com@dmarc.ietf.org
>>>>>>>> <mailto:fbrockne=40cisco.com@dmarc.ietf.org>
>>>>>>>>     <mailto:40cisco.com@dmarc.ietf.org>
>>>>>>>>     > <mailto:40cisco.com@dmarc.ietf.org
>>>>>>>>     <mailto:40cisco.com@dmarc.ietf.org>>> wrote:
>>>>>>>>     >
>>>>>>>>     >     Dear SFC WG,____
>>>>>>>>     >
>>>>>>>>     >     __ __
>>>>>>>>     >
>>>>>>>>     >     It’s been a while since we posted
>>>>>>>>     draft-ietf-sfc-proof-of-transit-04
>>>>>>>>     >     which addressed all known comments – see below.
>>>>>>>>     >     I’ve not seen any more recent comments or questions come up
>>>>>>>>     – and
>>>>>>>>     >     we’ve been through quite a few discussions and reviews of this
>>>>>>>>     >     document already.____
>>>>>>>>     >
>>>>>>>>     >     __ __
>>>>>>>>     >
>>>>>>>>     >     Thus the question: Are we ready for WG LC?____
>>>>>>>>     >
>>>>>>>>     >     __ __
>>>>>>>>     >
>>>>>>>>     >     Thanks, Frank____
>>>>>>>>     >
>>>>>>>>     >     __ __
>>>>>>>>     >
>>>>>>>>     >     *From:* Frank Brockners (fbrockne)
>>>>>>>>     >     *Sent:* Donnerstag, 21. November 2019 08:21
>>>>>>>>     >     *To:* Alejandro Aguado FI <a.aguadom@fi.upm.es
>>>>>>>> <mailto:a.aguadom@fi.upm.es>
>>>>>>>>     <mailto:a.aguadom@fi.upm.es>
>>>>>>>>     >     <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>>;
>>>>>>>>     Diego R. Lopez
>>>>>>>>     >     <diego.r.lopez@telefonica.com
>>>>>>>> <mailto:diego.r.lopez@telefonica.com>
>>>>>>>>     <mailto:diego.r.lopez@telefonica.com>
>>>>>>>>     >     <mailto:diego.r.lopez@telefonica.com
>>>>>>>>     <mailto:diego.r.lopez@telefonica.com>>>; Carlos Pignataro (cpignata)
>>>>>>>>     >     <cpignata@cisco.com <mailto:cpignata@cisco.com>
>>>>>>>> <mailto:cpignata@cisco.com>
>>>>>>>>     <mailto:cpignata@cisco.com <mailto:cpignata@cisco..com>>>;
>>>>>>>>     ALEJANDRO AGUADO
>>>>>>>>     >     MARTIN <alejandro.aguadomartin.ext@telefonica.com
>>>>>>>> <mailto:alejandro.aguadomartin.ext@telefonica.com>
>>>>>>>>     <mailto:alejandro.aguadomartin..ext@telefonica.com>
>>>>>>>>     >     <mailto:alejandro.aguadomartin.ext@telefonica.com
>>>>>>>>     <mailto:alejandro.aguadomartin..ext@telefonica.com>>>; Shwetha
>>>>>>>>     >     Bhandari (shwethab) <shwethab@cisco.com
>>>>>>>> <mailto:shwethab@cisco.com>
>>>>>>>>     <mailto:shwethab@cisco.com>
>>>>>>>>     >     <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com>>>;
>>>>>>>>     Tal Mizrahi <tal.mizrahi.phd@gmail.com
>>>>>>>> <mailto:tal.mizrahi.phd@gmail.com>
>>>>>>>>     <mailto:tal.mizrahi.phd@gmail.com>
>>>>>>>>     >     <mailto:tal.mizrahi.phd@gmail.com
>>>>>>>>     <mailto:tal.mizrahi.phd@gmail.com>>>
>>>>>>>>     >     *Cc:* sfc@ietf.org <mailto:sfc@ietf.org> <mailto:sfc@ietf.org>
>>>>>>>>     <mailto:sfc@ietf.org <mailto:sfc@ietf.org>>
>>>>>>>>     >     *Subject:* RE: PoT review/comments____
>>>>>>>>     >
>>>>>>>>     >     __ __
>>>>>>>>     >
>>>>>>>>     >     We’ve just posted revision -04 of
>>>>>>>>     draft-ietf-sfc-proof-of-transit
>>>>>>>>     >     which now includes support for OPOT configuration in the
>>>>>>>>     yang model;____
>>>>>>>>     >
>>>>>>>>     >     see section 5.2.3 in
>>>>>>>>     > https://www.ietf.org/id/draft-ietf-sfc-proof-of-transit-04.txt.
>>>>>>>> ____
>>>>>>>>     >
>>>>>>>>     >     The main addition is a grouping opot-profile, which adds
>>>>>>>>     upstream
>>>>>>>>     >     and downstream masks that OPOT requires.____
>>>>>>>>     >
>>>>>>>>     >     Thanks to Alejandro for suggesting these updates.____
>>>>>>>>     >
>>>>>>>>     >     __ __
>>>>>>>>     >
>>>>>>>>     >     This fixes the last “known issue” in
>>>>>>>>     >     draft-ietf-sfc-proof-of-transit. It would be great if you
>>>>>>>>     could give
>>>>>>>>     >     the document another careful read through.
>>>>>>>>     >     Are we ready for WGLC?____
>>>>>>>>     >
>>>>>>>>     >     __ __
>>>>>>>>     >
>>>>>>>>     >     Thanks, Frank____
>>>>>>>>     >
>>>>>>>>     >     __ __
>>>>>>>>     >
>>>>>>>>     >     __ __
>>>>>>>>     >
>>>>>>>>     >     *From:* Alejandro Aguado FI <a.aguadom@fi.upm.es
>>>>>>>> <mailto:a.aguadom@fi.upm.es>
>>>>>>>>     <mailto:a..aguadom@fi.upm.es>
>>>>>>>>     >     <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>>
>>>>>>>>     >     *Sent:* Donnerstag, 12. September 2019 15:40
>>>>>>>>     >     *To:* Diego R. Lopez <diego.r.lopez@telefonica.com
>>>>>>>> <mailto:diego.r.lopez@telefonica.com>
>>>>>>>>     <mailto:diego.r.lopez@telefonica.com>
>>>>>>>>     >     <mailto:diego.r.lopez@telefonica.com
>>>>>>>>     <mailto:diego.r.lopez@telefonica.com>>>; Carlos Pignataro (cpignata)
>>>>>>>>     >     <cpignata@cisco.com <mailto:cpignata@cisco.com>
>>>>>>>> <mailto:cpignata@cisco.com>
>>>>>>>>     <mailto:cpignata@cisco.com <mailto:cpignata@cisco..com>>>; Frank
>>>>>>>>     Brockners
>>>>>>>>     >     (fbrockne) <fbrockne@cisco.com <mailto:fbrockne@cisco.com>
>>>>>>>> <mailto:fbrockne@cisco.com>
>>>>>>>>     <mailto:fbrockne@cisco.com <mailto:fbrockne@cisco.com>>>;
>>>>>>>>     >     ALEJANDRO AGUADO MARTIN
>>>>>>>>     <alejandro.aguadomartin.ext@telefonica.com
>>>>>>>> <mailto:alejandro.aguadomartin.ext@telefonica.com>
>>>>>>>>     <mailto:alejandro.aguadomartin.ext@telefonica.com>
>>>>>>>>     >     <mailto:alejandro.aguadomartin.ext@telefonica.com
>>>>>>>>     <mailto:alejandro.aguadomartin..ext@telefonica.com>>>; Shwetha
>>>>>>>>     >     Bhandari (shwethab) <shwethab@cisco.com
>>>>>>>> <mailto:shwethab@cisco.com>
>>>>>>>>     <mailto:shwethab@cisco.com>
>>>>>>>>     >     <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com>>>;
>>>>>>>>     Tal Mizrahi <tal.mizrahi.phd@gmail.com
>>>>>>>> <mailto:tal.mizrahi.phd@gmail.com>
>>>>>>>>     <mailto:tal.mizrahi.phd@gmail.com>
>>>>>>>>     >     <mailto:tal.mizrahi.phd@gmail.com
>>>>>>>>     <mailto:tal.mizrahi.phd@gmail.com>>>
>>>>>>>>     >     *Cc:* sfc@ietf.org <mailto:sfc@ietf.org> <mailto:sfc@ietf.org>
>>>>>>>>     <mailto:sfc@ietf.org <mailto:sfc@ietf.org>>
>>>>>>>>     >     *Subject:* Re: PoT review/comments____
>>>>>>>>     >
>>>>>>>>     >     __ __
>>>>>>>>     >
>>>>>>>>     >     Hi Shwetha,____
>>>>>>>>     >
>>>>>>>>     >     __ __
>>>>>>>>     >
>>>>>>>>     >     Yes, I think it is a good idea. From your points, the second
>>>>>>>>     one is
>>>>>>>>     >     a bit confusing to me... But I do not fully remember how the
>>>>>>>>     model
>>>>>>>>     >     was structured, so I need to revise the document.____
>>>>>>>>     >
>>>>>>>>     >     __ __
>>>>>>>>     >
>>>>>>>>     >     Give me a day or two to explore again the model, and either we
>>>>>>>>     >     exchange few emails with proposals for the extension, or we can
>>>>>>>>     >     organise a quick call during next week to close a final
>>>>>>>>     proposal to
>>>>>>>>     >     share with other contributors.____
>>>>>>>>     >
>>>>>>>>     >     __ __
>>>>>>>>     >
>>>>>>>>     >     Thanks!____
>>>>>>>>     >
>>>>>>>>     >     __ __
>>>>>>>>     >
>>>>>>>>     >     Best,____
>>>>>>>>     >
>>>>>>>>     >     Alejandro____
>>>>>>>>     >
>>>>>>>>     >     __ __
>>>>>>>>     >
>>>>>>>>     >     __ __
>>>>>>>>     >
>>>>>>>>     >     El 12 de septiembre de 2019 a las 8:52:44, Shwetha Bhandari
>>>>>>>>     >     (shwethab) (shwethab@cisco.com <mailto:shwethab@cisco.com>
>>>>>>>> <mailto:shwethab@cisco.com>
>>>>>>>>     <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com>>)
>>>>>>>>     >     escribió:____
>>>>>>>>     >
>>>>>>>>     >     Hi Alejandro, Diego,____
>>>>>>>>     >
>>>>>>>>     >     ____
>>>>>>>>     >
>>>>>>>>     >     Since you added extension to do OPoT, should we extend the
>>>>>>>>     model in
>>>>>>>>     >     draft-ietf-sfc-proof-of-transit to enable OPoT and any
>>>>>>>>     parameters
>>>>>>>>     >     required for it  shared masks per link. If yes my proposal
>>>>>>>>     will be
>>>>>>>>     >     to:____
>>>>>>>>     >
>>>>>>>>     >      1. Augment existing pot-profile with fields to Enable OPoT
>>>>>>>>     and a
>>>>>>>>     >         cipher scheme if needed.____
>>>>>>>>     >      2. Separate container in the model to define a map of (Node
>>>>>>>>     >         link/interface, mask) to distribute pair wise masks. For
>>>>>>>>     e.g.
>>>>>>>>     >         Node link/interface identifier can be UUID as defined in
>>>>>>>>     rfc8348
>>>>>>>>     >         Or____
>>>>>>>>     >      3. Masks can be part of pot-profile.____
>>>>>>>>     >
>>>>>>>>     >     ____
>>>>>>>>     >
>>>>>>>>     >     What do you think about revising the model with this?____
>>>>>>>>     >
>>>>>>>>     >     ____
>>>>>>>>     >
>>>>>>>>     >     Thanks,____
>>>>>>>>     >
>>>>>>>>     >     Shwetha____
>>>>>>>>     >
>>>>>>>>     >     ____
>>>>>>>>     >
>>>>>>>>     >     *From: *"Frank Brockners (fbrockne)" <fbrockne@cisco.com
>>>>>>>> <mailto:fbrockne@cisco.com>
>>>>>>>>     <mailto:fbrockne@cisco.com>
>>>>>>>>     >     <mailto:fbrockne@cisco.com <mailto:fbrockne@cisco.com>>>
>>>>>>>>     >     *Date: *Wednesday, September 11, 2019 at 2:34 PM
>>>>>>>>     >     *To: *ALEJANDRO AGUADO MARTIN
>>>>>>>>     >     <alejandro.aguadomartin.ext@telefonica.com
>>>>>>>> <mailto:alejandro.aguadomartin.ext@telefonica.com>
>>>>>>>>     <mailto:alejandro.aguadomartin.ext@telefonica.com>
>>>>>>>>     >     <mailto:alejandro.aguadomartin.ext@telefonica.com
>>>>>>>>     <mailto:alejandro.aguadomartin..ext@telefonica.com>>>, "Diego R.
>>>>>>>>     >     Lopez" <diego.r.lopez@telefonica.com
>>>>>>>> <mailto:diego.r.lopez@telefonica.com>
>>>>>>>>     <mailto:diego.r.lopez@telefonica.com>
>>>>>>>>     >     <mailto:diego.r..lopez@telefonica.com
>>>>>>>>     <mailto:diego.r..lopez@telefonica.com>>>, Carlos Pignataro
>>>>>>>>     >     <cpignata@cisco..com <mailto:cpignata@cisco.com
>>>>>>>>     <mailto:cpignata@cisco.com>>>, Shwetha bhandari
>>>>>>>>     >     <shwethab@cisco.com <mailto:shwethab@cisco.com>
>>>>>>>> <mailto:shwethab@cisco.com>
>>>>>>>>     <mailto:shwethab@cisco.com <mailto:shwethab@cisco..com>>>, Tal
>>>>>>>> Mizrahi
>>>>>>>>     >     <tal.mizrahi.phd@gmail.com <mailto:tal.mizrahi.phd@gmail.com>
>>>>>>>>     <mailto:tal.mizrahi.phd@gmail.com>
>>>>>>>>     <mailto:tal.mizrahi.phd@gmail.com
>>>>>>>> <mailto:tal.mizrahi.phd@gmail.com>>>
>>>>>>>>     >     *Cc: *"a..aguadom@fi.upm.es <mailto:a..aguadom@fi.upm.es>
>>>>>>>> <mailto:a..aguadom@fi.upm.es>
>>>>>>>>     <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>"
>>>>>>>>     >     <a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>
>>>>>>>> <mailto:a.aguadom@fi.upm.es>
>>>>>>>>     <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>>,
>>>>>>>>     "sfc@ietf.org <mailto:sfc@ietf.org> <mailto:sfc@ietf.org>
>>>>>>>>     >     <mailto:sfc@ietf.org <mailto:sfc@ietf.org>>" <sfc@ietf.org
>>>>>>>> <mailto:sfc@ietf.org>
>>>>>>>>     <mailto:sfc@ietf.org> <mailto:sfc@ietf.org <mailto:sfc@ietf.org>>>
>>>>>>>>     >     *Subject: *RE: PoT review/comments____
>>>>>>>>     >
>>>>>>>>     >     ____
>>>>>>>>     >
>>>>>>>>     >     Hi Alejandro,____
>>>>>>>>     >
>>>>>>>>     >     ____
>>>>>>>>     >
>>>>>>>>     >     Thanks again for the review. Your comments have been
>>>>>>>>     integrated into
>>>>>>>>     >     draft-ietf-sfc-proof-of-transit-03 which just got posted.____
>>>>>>>>     >
>>>>>>>>     >     ____
>>>>>>>>     >
>>>>>>>>     >     Cheers, Frank____
>>>>>>>>     >
>>>>>>>>     >     ____
>>>>>>>>     >
>>>>>>>>     >     *From:*Frank Brockners (fbrockne)
>>>>>>>>     >     *Sent:* Montag, 27. Mai 2019 18:18
>>>>>>>>     >     *To:* ALEJANDRO AGUADO MARTIN
>>>>>>>>     >     <alejandro.aguadomartin.ext@telefonica.com
>>>>>>>> <mailto:alejandro.aguadomartin.ext@telefonica.com>
>>>>>>>>     <mailto:alejandro.aguadomartin.ext@telefonica.com>
>>>>>>>>     >     <mailto:alejandro.aguadomartin.ext@telefonica.com
>>>>>>>>     <mailto:alejandro.aguadomartin..ext@telefonica.com>>>; Diego R. Lopez
>>>>>>>>     >     <diego.r.lopez@telefonica.com
>>>>>>>> <mailto:diego.r.lopez@telefonica.com>
>>>>>>>>     <mailto:diego.r.lopez@telefonica.com>
>>>>>>>>     >     <mailto:diego.r.lopez@telefonica.com
>>>>>>>>     <mailto:diego.r.lopez@telefonica.com>>>; Carlos Pignataro (cpignata)
>>>>>>>>     >     <cpignata@cisco.com <mailto:cpignata@cisco.com>
>>>>>>>> <mailto:cpignata@cisco.com>
>>>>>>>>     <mailto:cpignata@cisco.com <mailto:cpignata@cisco..com>>>; Shwetha
>>>>>>>>     Bhandari
>>>>>>>>     >     (shwethab) <shwethab@cisco.com <mailto:shwethab@cisco.com>
>>>>>>>> <mailto:shwethab@cisco.com>
>>>>>>>>     <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com>>>; Tal
>>>>>>>>     >     Mizrahi <tal.mizrahi.phd@gmail.com
>>>>>>>> <mailto:tal.mizrahi.phd@gmail.com>
>>>>>>>>     <mailto:tal.mizrahi.phd@gmail..com>
>>>>>>>>     <mailto:tal.mizrahi.phd@gmail.com
>>>>>>>> <mailto:tal.mizrahi.phd@gmail.com>>>
>>>>>>>>     >     *Cc:* a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>
>>>>>>>> <mailto:a.aguadom@fi.upm.es>
>>>>>>>>     <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>;
>>>>>>>> sfc@ietf.org <mailto:sfc@ietf.org> <mailto:sfc@ietf.org>
>>>>>>>>     >     <mailto:sfc@ietf.org <mailto:sfc@ietf.org>>
>>>>>>>>     >     *Subject:* RE: PoT review/comments____
>>>>>>>>     >
>>>>>>>>     >     ____
>>>>>>>>     >
>>>>>>>>     >     Hi Alejandro,____
>>>>>>>>     >
>>>>>>>>     >     ____
>>>>>>>>     >
>>>>>>>>     >     Many thanks for the comments – and sorry for the delay –
>>>>>>>>     >     unfortunately your email somehow got dropped from my todo list.
>>>>>>>>     >     Please see inline…____
>>>>>>>>     >
>>>>>>>>     >     ____
>>>>>>>>     >
>>>>>>>>     >     (cc’ing the list as well).____
>>>>>>>>     >
>>>>>>>>     >     ____
>>>>>>>>     >
>>>>>>>>     >     *From:*ALEJANDRO AGUADO MARTIN
>>>>>>>>     >     <alejandro.aguadomartin..ext@telefonica.com
>>>>>>>> <mailto:alejandro.aguadomartin..ext@telefonica.com>
>>>>>>>>     <mailto:alejandro.aguadomartin..ext@telefonica.com>
>>>>>>>>     >     <mailto:alejandro.aguadomartin.ext@telefonica.com
>>>>>>>>     <mailto:alejandro.aguadomartin..ext@telefonica.com>>>
>>>>>>>>     >     *Sent:* Montag, 15. April 2019 17:27
>>>>>>>>     >     *To:* Diego R. Lopez <diego.r.lopez@telefonica.com
>>>>>>>> <mailto:diego.r.lopez@telefonica.com>
>>>>>>>>     <mailto:diego.r.lopez@telefonica.com>
>>>>>>>>     >     <mailto:diego.r.lopez@telefonica.com
>>>>>>>>     <mailto:diego.r.lopez@telefonica.com>>>; Carlos Pignataro (cpignata)
>>>>>>>>     >     <cpignata@cisco.com <mailto:cpignata@cisco.com>
>>>>>>>> <mailto:cpignata@cisco.com>
>>>>>>>>     <mailto:cpignata@cisco.com <mailto:cpignata@cisco..com>>>; Frank
>>>>>>>>     Brockners
>>>>>>>>     >     (fbrockne) <fbrockne@cisco.com <mailto:fbrockne@cisco.com>
>>>>>>>> <mailto:fbrockne@cisco.com>
>>>>>>>>     <mailto:fbrockne@cisco.com <mailto:fbrockne@cisco.com>>>; Shwetha
>>>>>>>>     >     Bhandari (shwethab) <shwethab@cisco.com
>>>>>>>> <mailto:shwethab@cisco.com>
>>>>>>>>     <mailto:shwethab@cisco.com>
>>>>>>>>     >     <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com>>>;
>>>>>>>>     Tal Mizrahi <tal.mizrahi.phd@gmail.com
>>>>>>>> <mailto:tal.mizrahi.phd@gmail.com>
>>>>>>>>     <mailto:tal.mizrahi.phd@gmail.com>
>>>>>>>>     >     <mailto:tal.mizrahi.phd@gmail.com
>>>>>>>>     <mailto:tal.mizrahi.phd@gmail.com>>>
>>>>>>>>     >     *Cc:* a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>
>>>>>>>> <mailto:a.aguadom@fi.upm.es>
>>>>>>>>     <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>
>>>>>>>>     >     *Subject:* PoT review/comments____
>>>>>>>>     >
>>>>>>>>     >     ____
>>>>>>>>     >
>>>>>>>>     >     Dear all,____
>>>>>>>>     >
>>>>>>>>     >     ____
>>>>>>>>     >
>>>>>>>>     >     I gave a quick review to the PoT document. Some comments:____
>>>>>>>>     >
>>>>>>>>     >     ____
>>>>>>>>     >
>>>>>>>>     >     - I read “The non-constant coefficients are used to
>>>>>>>> generate the
>>>>>>>>     >     Lagrange Polynomial Constants (LPC).” As far as I
>>>>>>>>     understood, the
>>>>>>>>     >     points assigned to each node (Xi) are the ones used for
>>>>>>>>     generating
>>>>>>>>     >     the LPCi, aren’t they?____
>>>>>>>>     >
>>>>>>>>     >     */…FB: Good catch. The LPCs are of course computed using (x_i,
>>>>>>>>     >     y_i)./*____
>>>>>>>>     >
>>>>>>>>     >     - If we go for including the YANG in the current document
>>>>>>>>     (which I
>>>>>>>>     >     agree), parameters should be described before the yang
>>>>>>>>     definition,
>>>>>>>>     >     and maybe it would be helpful to have the yang tree (see the
>>>>>>>>     current
>>>>>>>>     >     version attached).____
>>>>>>>>     >
>>>>>>>>     >     */…FB: Thanks. IMHO it makes sense to keep the YANG model
>>>>>>>> in the
>>>>>>>>     >     current doc, given that the model and the description go
>>>>>>>> hand in
>>>>>>>>     >     hand. We can of course also include the yang tree to make
>>>>>>>>     reading
>>>>>>>>     >     easier. This is consistent with other documents which
>>>>>>>>     specify YANG
>>>>>>>>     >     models./*____
>>>>>>>>     >
>>>>>>>>     >     - I include in the attached file few questions about naming
>>>>>>>>     of some
>>>>>>>>     >     parameters.____
>>>>>>>>     >
>>>>>>>>     >     *//*____
>>>>>>>>     >
>>>>>>>>     >     */…FB:
>>>>>>>>     >     - naming F_i(x_i, y_i) – I agree that a better name could be
>>>>>>>>     used.
>>>>>>>>     >     The only potential concern would be that the open source
>>>>>>>>     >     implementation in OpenDaylight uses this naming – changing
>>>>>>>>     it might
>>>>>>>>     >     lead to confusion.. We can start with adding a comment to make
>>>>>>>>     >     things clearer./*____
>>>>>>>>     >
>>>>>>>>     >     *//*____
>>>>>>>>     >
>>>>>>>>     >     */- secret key – this is the constant part of the first
>>>>>>>>     polynomial
>>>>>>>>     >     which serves as the secret – and which is re-retrieved.
>>>>>>>>     Again, we
>>>>>>>>     >     can update the description to make things clearer./*____
>>>>>>>>     >
>>>>>>>>     >     *//*____
>>>>>>>>     >
>>>>>>>>     >     */- size of the random number: This is unrelated to OPOT.
>>>>>>>>     The random
>>>>>>>>     >     number is to uniquely identify a packet. There is a trade-off
>>>>>>>>     >     between the size of the random number and how often you need to
>>>>>>>>     >     re-key your system. At high speeds, the random number – which
>>>>>>>>     >     identifies a particular packet – is used up quite quickly if
>>>>>>>>     it is
>>>>>>>>     >     only 32-bit wide. See section 4
>>>>>>>>     >
>>>>>>>>         /*https://tools.ietf.org/html/draft-ietf-sfc-proof-of-transit-02#section-4____
>>>>>>>>     >
>>>>>>>>     >     *//*____
>>>>>>>>     >
>>>>>>>>     >     */- number of profiles: For a deployment which is expected
>>>>>>>>     to renew
>>>>>>>>     >     keys every now and then (e.g. you run with 32-bit random
>>>>>>>>     numbers at
>>>>>>>>     >     reasonably high speeds), you need at least 2 profiles – an
>>>>>>>>     active
>>>>>>>>     >     one and one that you can activate once you run out of random
>>>>>>>>     numbers
>>>>>>>>     >     (which is what the encapsulating node would decide).. /*____
>>>>>>>>     >
>>>>>>>>     >     - I have checked some of the existing YANG files within the
>>>>>>>>     IETF to
>>>>>>>>     >     see in which it would be helpful to include. From the (not
>>>>>>>>     so) old
>>>>>>>>     >     OpenFlow, I assume that one match is necessary (for
>>>>>>>> identify the
>>>>>>>>     >     iOAM/PoT header) whilst the source node can use any existing
>>>>>>>>     match
>>>>>>>>     >     field to identify packets where to apply the PoT scheme. In
>>>>>>>>     terms of
>>>>>>>>     >     actions, I would say that two may be required: for any node, an
>>>>>>>>     >     update-pot is necessary, while the verifier would need a
>>>>>>>>     verify-pot
>>>>>>>>     >     type of action, that would ideally either remove the header
>>>>>>>>     or drop
>>>>>>>>     >     the packet if fails (I do not know if you are thinking in more
>>>>>>>>     >     complex scenarios).____
>>>>>>>>     >
>>>>>>>>     >     *//*____
>>>>>>>>     >
>>>>>>>>     >     */…FB: From an OF perspective, that sounds feasible.. That
>>>>>>>>     said, we
>>>>>>>>     >     probably want to avoid making the spec specific to a
>>>>>>>>     technology like
>>>>>>>>     >     OF, hence would suggest that we don’t specify such a
>>>>>>>> behavior as
>>>>>>>>     >     part of this document./*____
>>>>>>>>     >
>>>>>>>>     >     *//*____
>>>>>>>>     >
>>>>>>>>     >     - For this last point, I have seen the definitions within
>>>>>>>>     >     draft-asechoud-rtgwg-qos-model-08, where matched could map
>>>>>>>>     (if I am
>>>>>>>>     >     not wrong) to classifiers/filters, and actions to actions. I
>>>>>>>>     send
>>>>>>>>     >     you the models in a zip file. In this sense the model to be
>>>>>>>>     defined
>>>>>>>>     >     in the PoT shall be an augment of the models defined in that
>>>>>>>>     >     document. I have not done a very deep revision on the model,
>>>>>>>>     but I
>>>>>>>>     >     think it could fit there. If you have check this or other
>>>>>>>>     models,
>>>>>>>>     >     let me know so I could also help.____
>>>>>>>>     >
>>>>>>>>     >     *//*____
>>>>>>>>     >
>>>>>>>>     >     */…FB: Per my note above: In order to keep POT generic and
>>>>>>>>     not link
>>>>>>>>     >     it to a particular classification mechanism, I’d prefer to
>>>>>>>>     keep the
>>>>>>>>     >     classification question as out of scope for the current
>>>>>>>>     document.
>>>>>>>>     >     That way it can also apply to technologies which come with
>>>>>>>>     their own
>>>>>>>>     >     way to classify – and which might fully decouple the tunneling
>>>>>>>>     >     aspects from the classification aspects. /*____
>>>>>>>>     >
>>>>>>>>     >     ____
>>>>>>>>     >
>>>>>>>>     >     Thanks a lot and sorry for such long email.____
>>>>>>>>     >
>>>>>>>>     >     ____
>>>>>>>>     >
>>>>>>>>     >     */..FB: Thanks again for all your comments. We’ll get them
>>>>>>>>     included
>>>>>>>>     >     in the next revision. /*____
>>>>>>>>     >
>>>>>>>>     >     *//*____
>>>>>>>>     >
>>>>>>>>     >     */Cheers, Frank/*____
>>>>>>>>     >
>>>>>>>>     >     ____
>>>>>>>>     >
>>>>>>>>     >     ____
>>>>>>>>     >
>>>>>>>>     >     ____
>>>>>>>>     >
>>>>>>>>     >     Best,____
>>>>>>>>     >
>>>>>>>>     >     Alejandro____
>>>>>>>>     >
>>>>>>>>     >     ____
>>>>>>>>     >
>>>>>>>>     >     ____
>>>>>>>>     >
>>>>>>>>     >     ____
>>>>>>>>     >
>>>>>>>>     >     ____
>>>>>>>>     >
>>>>>>>>     >
>>>>>>>>         ------------------------------------------------------------------------
>>>>>>>>     >
>>>>>>>>     >
>>>>>>>>     >     Este mensaje y sus adjuntos se dirigen exclusivamente a su
>>>>>>>>     >     destinatario, puede contener información privilegiada o
>>>>>>>>     confidencial
>>>>>>>>     >     y es para uso exclusivo de la persona o entidad de destino.
>>>>>>>>     Si no es
>>>>>>>>     >     usted. el destinatario indicado, queda notificado de que la
>>>>>>>>     lectura,
>>>>>>>>     >     utilización, divulgación y/o copia sin autorización puede estar
>>>>>>>>     >     prohibida en virtud de la legislación vigente. Si ha
>>>>>>>>     recibido este
>>>>>>>>     >     mensaje por error, le rogamos que nos lo comunique
>>>>>>>>     inmediatamente
>>>>>>>>     >     por esta misma vía y proceda a su destrucción.
>>>>>>>>     >
>>>>>>>>     >     The information contained in this transmission is
>>>>>>>> privileged and
>>>>>>>>     >     confidential information intended only for the use of the
>>>>>>>>     individual
>>>>>>>>     >     or entity named above. If the reader of this message is not the
>>>>>>>>     >     intended recipient, you are hereby notified that any
>>>>>>>>     dissemination,
>>>>>>>>     >     distribution or copying of this communication is strictly
>>>>>>>>     >     prohibited. If you have received this transmission in error,
>>>>>>>>     do not
>>>>>>>>     >     read it. Please immediately reply to the sender that you have
>>>>>>>>     >     received this communication in error and then delete it.
>>>>>>>>     >
>>>>>>>>     >     Esta mensagem e seus anexos se dirigem exclusivamente ao seu
>>>>>>>>     >     destinatário, pode conter informação privilegiada ou
>>>>>>>>     confidencial e
>>>>>>>>     >     é para uso exclusivo da pessoa ou entidade de destino. Se não é
>>>>>>>>     >     vossa senhoria o destinatário indicado, fica notificado de
>>>>>>>> que a
>>>>>>>>     >     leitura, utilização, divulgação e/ou cópia sem autorização pode
>>>>>>>>     >     estar proibida em virtude da legislação vigente. Se recebeu
>>>>>>>> esta
>>>>>>>>     >     mensagem por erro, rogamos-lhe que nos o comunique
>>>>>>>>     imediatamente por
>>>>>>>>     >     esta mesma via e proceda a sua destruição____
>>>>>>>>     >
>>>>>>>>     >     _______________________________________________
>>>>>>>>     >     sfc mailing list
>>>>>>>>     > sfc@ietf.org <mailto:sfc@ietf.org> <mailto:sfc@ietf.org>
>>>>>>>> <mailto:sfc@ietf.org
>>>>>>>>     <mailto:sfc@ietf.org>>
>>>>>>>>     > https://www.ietf.org/mailman/listinfo/sfc
>>>>>>>>     >
>>>>>>>>     >
>>>>>>>>     > _______________________________________________
>>>>>>>>     > sfc mailing list
>>>>>>>>     > sfc@ietf.org <mailto:sfc@ietf.org> <mailto:sfc@ietf.org>
>>>>>>>>     > https://www.ietf.org/mailman/listinfo/sfc
>>>>>>>>     >
>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> sfc mailing list
>>>>>>>> sfc@ietf.org <mailto:sfc@ietf.org> <mailto:sfc@ietf.org>
>>>>>>>> https://www.ietf.org/mailman/listinfo/sfc
>>>>>
>>>>
>>>> _______________________________________________
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> 


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From: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
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Thread-Topic: [sfc] draft-ietf-sfc-proof-of-transit-04 ready for WGLC? (was RE: PoT review/comments)
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Subject: Re: [sfc] draft-ietf-sfc-proof-of-transit-04 ready for WGLC? (was RE: PoT review/comments)
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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Wed, 1 Apr 2020 16:28:55 -0700
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To: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
Cc: "Joel M. Halpern" <jmh@joelhalpern.com>, "sfc@ietf.org" <sfc@ietf.org>
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Subject: Re: [sfc] draft-ietf-sfc-proof-of-transit-04 ready for WGLC? (was RE: PoT review/comments)
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Dear Carlos,
I believe that Joel has expressed it clearly and I concur with his
reasoning.

Regards,
Greg

On Wed, Apr 1, 2020 at 4:13 PM Carlos Pignataro (cpignata) <
cpignata@cisco.com> wrote:

> Dear Greg,
>
> This seems to be a rephrase of the previous email, yet I still do not
> follow the cause-effect in your argument.
>
> Normative does not mean =E2=80=9Ca reference that defines technology with=
in the
> same Working Group=E2=80=99s documents that can be used=E2=80=9D.
>
> The definition and clarification statement at [1] says =E2=80=9Cdocuments=
 that
> must be read to understand or implement the technology in the new RFC=E2=
=80=9D. It
> does not speak to WG charters or.
>
> Is the technology in draft-ietf-sfc-ioam-nsh a =E2=80=9Cmust=E2=80=9D for
> draft-ietf-sfc-proof-of-transit? It seems to me that the only =E2=80=9Cmu=
st=E2=80=9D
> technology is ippm-ioam-data. I appreciate that this is also not
> necessarily a yes/no binary answer...
>
> [Again, I am OK either way, for the right reason]
>
> Carlos.
>
> [1]
> https://www.ietf.org/about/groups/iesg/statements/normative-informative-r=
eferences/
>
>
> > 2020/04/01 =E5=8D=88=E5=BE=8C3:36=E3=80=81Greg Mirsky <gregimirsky@gmai=
l.com>=E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:
> >
> > Dear Carlos,
> > in my previous note I have recognized that POT, as SFC, can be realized
> using different techniques. But this is SFC WG document and, as I
> understand the charter of SFC WG, we're defining technologies that use SF=
C
> NSH. Hence my conclusion that the reference to draft-ietf-sfc-ioam-nsh
> should be normative, as that is the only document that defines iOAM
> encapsulation in NSH. Making the reference informational could be
> interpreted as suggestion that POT in SFC NSH might be encapsulated not a=
s
> iOAM but in some other manner. And while that is possible, I don't see a
> proposal that describes such alternative encapsulation. So, it appears th=
at
> the WG has agreed that POT in SFC NSH should use encapsulation as defined
> in draft-ietf-sfc-ioam-nsh.
> >
> > Regards,
> > Greg
> >
> > On Wed, Apr 1, 2020 at 12:16 PM Carlos Pignataro (cpignata) <
> cpignata@cisco.com> wrote:
> > Dear Greg,
> >
> > > 2020/04/01 =E5=8D=88=E5=BE=8C2:59=E3=80=81Greg Mirsky <gregimirsky@gm=
ail.com>=E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:
> > >
> > > Dear All,
> > > I agree with Joel that the reference in
> draft-ietf-sfc-proof-of-transit to draft-ietf-ippm-ioam-data should be
> normative.
> >
> > Great. Everyone seems to be aligned on this point.
> >
> >
> > > I also support the proposal to add in draft-ietf-sfc-proof-of-transit
> a normative reference to draft-ietf-sfc-ioam-nsh. SFC WG is working on
> defining SFC that is based on NSH (SFC NSH), and while SFC might be
> realized using other techniques, draft-ietf-sfc-ioam-nsh is, and likely
> will remain, the only document that is describing iOAM encapsulation in S=
FC
> NSH. Thus, I believe, for SFC WG, implementation of PoT based on iOAM
> requires implementation of iOAM encapsulation in SFC NSH, as defined in
> draft-ietf-sfc-ioam-nsh. Hence, the reference must be normative.
> >
> >
> > This logic is flawed in the onset. The main point is that POT can be
> realized with a variety of transports and technologies and use-cases, one
> of which is SFC, and then further within SFC one of which is NSH.
> >
> > You seem to argue that NSH is somehow in practice the only SFC
> realization, and because of that the reference =E2=80=9Cmust be normative=
=E2=80=9D.
> >
> > I disagree with the premise, but regardless, it does not matter since
> POT applies to other non-SFC(-non-NSH) technologies. Therefore that
> since-then logic does not apply.
> >
> > Copying the very first sentence of the Abstract:
> >
> >    Several technologies such as Traffic Engineering (TE), Service
> >    Function Chaining (SFC), and policy based routing [...]
> >
> >
> > And now looking at this fragment, I am more convinced that this is one
> example and as such Informative.
> >
> > I would not object to Normative for the right reasons, but the reason
> above, in my mind, does not follow.
> >
> > Thanks,
> >
> > Carlos.
> >
> >
> > >
> > > Regards,
> > > Greg
> > >
> > > On Tue, Mar 24, 2020 at 2:25 PM Joel M. Halpern <jmh@joelhalpern.com>
> wrote:
> > > I think we all agree that draft-ietf-sfc-proof-of-transit requires th=
e
> > > normative reference to draft-ietf-ippm-ioam-data.
> > >
> > > Regarding a reference from draft-ietf-sfc-proof-of-transit to
> > > draft-ietf-sfc-ioam-nsh, I think we agree that it is needed.  The
> > > question then is normative or informative.  If we use the usual IETF
> > > rule that there has to be a defined normative way to interoperably
> > > implement a protocol spec (with other options allowed), my inclinatio=
n
> > > is that the reference should be normative.
> > >
> > > Regarding the informative reference in the other direction from
> > > draft-ietf-sfc-ioam-nsh to draft-ietf-sfc-proof-of-transit, while I
> > > personally like the idea, that is up to you / the working group.
> > >
> > > Yours,
> > > Joel
> > >
> > > On 3/24/2020 5:20 PM, Carlos Pignataro (cpignata) wrote:
> > > > Hi, Joel,
> > > >
> > > > The way in which the doc hierarchy and relationship is structure
> seems
> > > > to support and potentially even require:
> > > >
> > > > From draft-ietf-sfc-proof-of-transit:
> > > > * A normative reference to [I-D.ietf-ippm-ioam-data], since PoT
> gives
> > > > over IOAM explicitly, and that exists.
> > > > * Optionally, an Informative reference to draft-ietf-sfc-ioam-nsh,
> since
> > > > that=E2=80=99s really one out of many ways to carry IOAM over NSH, =
but
> separated
> > > > by document indirection. This does not exist but can be added.
> > > >
> > > >  From draft-ietf-sfc-ioam-nsh:
> > > > * Optionally, an Informative reference to
> > > > draft-ietf-sfc-proof-of-transit, since that=E2=80=99s one out of ma=
ny
> > > > applications. This does not exist but can be added.
> > > >
> > > > Thoughts?
> > > >
> > > > Best,
> > > >
> > > > Carlos.
> > > >
> > > >> 2020/03/24 =E5=8D=88=E5=BE=8C5:10=E3=80=81Joel M. Halpern <jmh@joe=
lhalpern.com
> > > >> <mailto:jmh@joelhalpern.com>>=E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:
> > > >>
> > > >> Carlos, it sounds like there should probably be a normative
> reference
> > > >> from draft-ietf-sfc-proof of transit to draft-ietf-sfc-ioam-nsh?
> > > >> Possibly in the same sentence that refers to
> draft-ietf-ippm-ioam-data?
> > > >>
> > > >> Yours,
> > > >> Joel
> > > >>
> > > >> On 3/24/2020 4:54 PM, Carlos Pignataro (cpignata) wrote:
> > > >>> Greg,
> > > >>> The very first sentence of the PoT document reads:
> > > >>>    Several technologies such as Traffic Engineering (TE), Service
> > > >>>    Function Chaining (SFC), and policy based routing are used to
> steer
> > > >>>    traffic through a specific, user-defined path.  This document
> defines
> > > >>> Explaining how this document is applicable to various
> > > >>> traffic-steering technologies.
> > > >>> Section 3 then explains:
> > > >>>    The POT information is encapsulated in packets as an IOAM Proo=
f
> Of
> > > >>>    Transit Option.  The details and format of the encapsulation
> and the
> > > >>>    POT Option format are specified in [I-D.ietf-ippm-ioam-data].
> > > >>> Which shows how to carry PoT in IOAM, with an appropriate pointer=
.
> > > >>> Lastly, draft-ietf-sfc-ioam-nsh-03 defines IOAM over an NSH
> > > >>> encapsulation.
> > > >>> This arrangements maximizes specification modularity and
> > > >>> portability/reusability.
> > > >>> Best,
> > > >>> Carlos.
> > > >>>> 2020/03/24 =E5=8D=88=E5=BE=8C4:48=E3=80=81Greg Mirsky <gregimirs=
ky@gmail.com
> > > >>>> <mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com
> >>=E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:
> > > >>>>
> > > >>>> Hi Joel,
> > > >>>> thank you for the most expedient response. As I understand it,
> iOAM
> > > >>>> Data draft describes the format of the informational element tha=
t
> > > >>>> carries POT-related information but it does not define how the
> > > >>>> element to be carried in case of NSH encapsulation. And that is
> what
> > > >>>> I was asking, apologies for not being clear in my first note.
> > > >>>>
> > > >>>> Regards,
> > > >>>> Greg
> > > >>>>
> > > >>>> On Tue, Mar 24, 2020 at 1:42 PM Joel M.. Halpern
> > > >>>> <jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>
> > > >>>> <mailto:jmh@joelhalpern.com>> wrote:
> > > >>>>
> > > >>>>    Regarding the information carriage, the PoT document points t=
o
> the
> > > >>>>    IOAM
> > > >>>>    document.
> > > >>>>
> https://tools.ietf.org/html/draft-ietf-ippm-ioam-data-08#section-4.5
> > > >>>>    gives the format (and ways to have other formats if needed.)
> > > >>>>
> > > >>>>    Yours,
> > > >>>>    Joel
> > > >>>>
> > > >>>>    On 3/24/2020 4:26 PM, Greg Mirsky wrote:
> > > >>>>    > Hi Frank,
> > > >>>>    > thank you for reminding us about this important work, indee=
d
> we
> > > >>>>    should
> > > >>>>    > complete it. I've reviewed the draft and have several
> questions.
> > > >>>>    Please
> > > >>>>    > kindly consider:
> > > >>>>    >
> > > >>>>    >   * I couldn't find information where, relative to NSH, RND
> and
> > > >>>>    CML are
> > > >>>>    >     transported
> > > >>>>    >   * for YANG data models using "reference" is strongly
> > > >>>>    encouraged as it
> > > >>>>    >     provides a pointer to the specification. Since the POT
> data
> > > >>>>    model is
> > > >>>>    >     in the same document as the POT specification, listing
> the
> > > >>>>    >     appropriate section should suffice
> > > >>>>    >
> > > >>>>    > Regards,
> > > >>>>    > Greg
> > > >>>>    >
> > > >>>>    > On Thu, Mar 19, 2020 at 6:45 AM Frank Brockners (fbrockne)
> > > >>>>    > <fbrockne=3D40cisco.com@dmarc.ietf.org
> > > >>>> <mailto:fbrockne=3D40cisco.com@dmarc.ietf.org>
> > > >>>>    <mailto:40cisco.com@dmarc.ietf.org>
> > > >>>>    > <mailto:40cisco.com@dmarc.ietf.org
> > > >>>>    <mailto:40cisco.com@dmarc.ietf.org>>> wrote:
> > > >>>>    >
> > > >>>>    >     Dear SFC WG,____
> > > >>>>    >
> > > >>>>    >     __ __
> > > >>>>    >
> > > >>>>    >     It=E2=80=99s been a while since we posted
> > > >>>>    draft-ietf-sfc-proof-of-transit-04
> > > >>>>    >     which addressed all known comments =E2=80=93 see below.
> > > >>>>    >     I=E2=80=99ve not seen any more recent comments or quest=
ions come
> up
> > > >>>>    =E2=80=93 and
> > > >>>>    >     we=E2=80=99ve been through quite a few discussions and =
reviews
> of this
> > > >>>>    >     document already.____
> > > >>>>    >
> > > >>>>    >     __ __
> > > >>>>    >
> > > >>>>    >     Thus the question: Are we ready for WG LC?____
> > > >>>>    >
> > > >>>>    >     __ __
> > > >>>>    >
> > > >>>>    >     Thanks, Frank____
> > > >>>>    >
> > > >>>>    >     __ __
> > > >>>>    >
> > > >>>>    >     *From:* Frank Brockners (fbrockne)
> > > >>>>    >     *Sent:* Donnerstag, 21. November 2019 08:21
> > > >>>>    >     *To:* Alejandro Aguado FI <a.aguadom@fi.upm.es
> > > >>>> <mailto:a.aguadom@fi.upm.es>
> > > >>>>    <mailto:a.aguadom@fi.upm.es>
> > > >>>>    >     <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es
> >>>;
> > > >>>>    Diego R. Lopez
> > > >>>>    >     <diego.r.lopez@telefonica.com
> > > >>>> <mailto:diego.r.lopez@telefonica.com>
> > > >>>>    <mailto:diego.r.lopez@telefonica.com>
> > > >>>>    >     <mailto:diego.r.lopez@telefonica.com
> > > >>>>    <mailto:diego.r.lopez@telefonica.com>>>; Carlos Pignataro
> (cpignata)
> > > >>>>    >     <cpignata@cisco.com <mailto:cpignata@cisco.com>
> > > >>>> <mailto:cpignata@cisco.com>
> > > >>>>    <mailto:cpignata@cisco.com <mailto:cpignata@cisco..com>>>;
> > > >>>>    ALEJANDRO AGUADO
> > > >>>>    >     MARTIN <alejandro.aguadomartin.ext@telefonica.com
> > > >>>> <mailto:alejandro.aguadomartin.ext@telefonica.com>
> > > >>>>    <mailto:alejandro.aguadomartin..ext@telefonica.com>
> > > >>>>    >     <mailto:alejandro.aguadomartin.ext@telefonica.com
> > > >>>>    <mailto:alejandro.aguadomartin..ext@telefonica.com>>>; Shweth=
a
> > > >>>>    >     Bhandari (shwethab) <shwethab@cisco.com
> > > >>>> <mailto:shwethab@cisco.com>
> > > >>>>    <mailto:shwethab@cisco.com>
> > > >>>>    >     <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com
> >>>;
> > > >>>>    Tal Mizrahi <tal.mizrahi.phd@gmail.com
> > > >>>> <mailto:tal.mizrahi.phd@gmail.com>
> > > >>>>    <mailto:tal.mizrahi.phd@gmail.com>
> > > >>>>    >     <mailto:tal.mizrahi.phd@gmail.com
> > > >>>>    <mailto:tal.mizrahi.phd@gmail.com>>>
> > > >>>>    >     *Cc:* sfc@ietf.org <mailto:sfc@ietf.org> <mailto:
> sfc@ietf.org>
> > > >>>>    <mailto:sfc@ietf.org <mailto:sfc@ietf.org>>
> > > >>>>    >     *Subject:* RE: PoT review/comments____
> > > >>>>    >
> > > >>>>    >     __ __
> > > >>>>    >
> > > >>>>    >     We=E2=80=99ve just posted revision -04 of
> > > >>>>    draft-ietf-sfc-proof-of-transit
> > > >>>>    >     which now includes support for OPOT configuration in th=
e
> > > >>>>    yang model;____
> > > >>>>    >
> > > >>>>    >     see section 5.2.3 in
> > > >>>>    >
> https://www.ietf.org/id/draft-ietf-sfc-proof-of-transit-04.txt.
> > > >>>> ____
> > > >>>>    >
> > > >>>>    >     The main addition is a grouping opot-profile, which add=
s
> > > >>>>    upstream
> > > >>>>    >     and downstream masks that OPOT requires.____
> > > >>>>    >
> > > >>>>    >     Thanks to Alejandro for suggesting these updates.____
> > > >>>>    >
> > > >>>>    >     __ __
> > > >>>>    >
> > > >>>>    >     This fixes the last =E2=80=9Cknown issue=E2=80=9D in
> > > >>>>    >     draft-ietf-sfc-proof-of-transit. It would be great if y=
ou
> > > >>>>    could give
> > > >>>>    >     the document another careful read through.
> > > >>>>    >     Are we ready for WGLC?____
> > > >>>>    >
> > > >>>>    >     __ __
> > > >>>>    >
> > > >>>>    >     Thanks, Frank____
> > > >>>>    >
> > > >>>>    >     __ __
> > > >>>>    >
> > > >>>>    >     __ __
> > > >>>>    >
> > > >>>>    >     *From:* Alejandro Aguado FI <a.aguadom@fi.upm.es
> > > >>>> <mailto:a.aguadom@fi.upm.es>
> > > >>>>    <mailto:a..aguadom@fi.upm.es>
> > > >>>>    >     <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es
> >>>
> > > >>>>    >     *Sent:* Donnerstag, 12. September 2019 15:40
> > > >>>>    >     *To:* Diego R. Lopez <diego.r.lopez@telefonica.com
> > > >>>> <mailto:diego.r.lopez@telefonica.com>
> > > >>>>    <mailto:diego.r.lopez@telefonica.com>
> > > >>>>    >     <mailto:diego.r.lopez@telefonica.com
> > > >>>>    <mailto:diego.r.lopez@telefonica.com>>>; Carlos Pignataro
> (cpignata)
> > > >>>>    >     <cpignata@cisco.com <mailto:cpignata@cisco.com>
> > > >>>> <mailto:cpignata@cisco.com>
> > > >>>>    <mailto:cpignata@cisco.com <mailto:cpignata@cisco..com>>>;
> Frank
> > > >>>>    Brockners
> > > >>>>    >     (fbrockne) <fbrockne@cisco.com <mailto:
> fbrockne@cisco.com>
> > > >>>> <mailto:fbrockne@cisco.com>
> > > >>>>    <mailto:fbrockne@cisco.com <mailto:fbrockne@cisco.com>>>;
> > > >>>>    >     ALEJANDRO AGUADO MARTIN
> > > >>>>    <alejandro.aguadomartin.ext@telefonica.com
> > > >>>> <mailto:alejandro.aguadomartin.ext@telefonica.com>
> > > >>>>    <mailto:alejandro.aguadomartin.ext@telefonica.com>
> > > >>>>    >     <mailto:alejandro.aguadomartin.ext@telefonica.com
> > > >>>>    <mailto:alejandro.aguadomartin..ext@telefonica.com>>>; Shweth=
a
> > > >>>>    >     Bhandari (shwethab) <shwethab@cisco.com
> > > >>>> <mailto:shwethab@cisco.com>
> > > >>>>    <mailto:shwethab@cisco.com>
> > > >>>>    >     <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com
> >>>;
> > > >>>>    Tal Mizrahi <tal.mizrahi.phd@gmail.com
> > > >>>> <mailto:tal.mizrahi.phd@gmail.com>
> > > >>>>    <mailto:tal.mizrahi.phd@gmail.com>
> > > >>>>    >     <mailto:tal.mizrahi.phd@gmail.com
> > > >>>>    <mailto:tal.mizrahi.phd@gmail.com>>>
> > > >>>>    >     *Cc:* sfc@ietf.org <mailto:sfc@ietf.org> <mailto:
> sfc@ietf.org>
> > > >>>>    <mailto:sfc@ietf.org <mailto:sfc@ietf.org>>
> > > >>>>    >     *Subject:* Re: PoT review/comments____
> > > >>>>    >
> > > >>>>    >     __ __
> > > >>>>    >
> > > >>>>    >     Hi Shwetha,____
> > > >>>>    >
> > > >>>>    >     __ __
> > > >>>>    >
> > > >>>>    >     Yes, I think it is a good idea. From your points, the
> second
> > > >>>>    one is
> > > >>>>    >     a bit confusing to me... But I do not fully remember ho=
w
> the
> > > >>>>    model
> > > >>>>    >     was structured, so I need to revise the document.____
> > > >>>>    >
> > > >>>>    >     __ __
> > > >>>>    >
> > > >>>>    >     Give me a day or two to explore again the model, and
> either we
> > > >>>>    >     exchange few emails with proposals for the extension, o=
r
> we can
> > > >>>>    >     organise a quick call during next week to close a final
> > > >>>>    proposal to
> > > >>>>    >     share with other contributors.____
> > > >>>>    >
> > > >>>>    >     __ __
> > > >>>>    >
> > > >>>>    >     Thanks!____
> > > >>>>    >
> > > >>>>    >     __ __
> > > >>>>    >
> > > >>>>    >     Best,____
> > > >>>>    >
> > > >>>>    >     Alejandro____
> > > >>>>    >
> > > >>>>    >     __ __
> > > >>>>    >
> > > >>>>    >     __ __
> > > >>>>    >
> > > >>>>    >     El 12 de septiembre de 2019 a las 8:52:44, Shwetha
> Bhandari
> > > >>>>    >     (shwethab) (shwethab@cisco.com <mailto:
> shwethab@cisco.com>
> > > >>>> <mailto:shwethab@cisco.com>
> > > >>>>    <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com>>)
> > > >>>>    >     escribi=C3=B3:____
> > > >>>>    >
> > > >>>>    >     Hi Alejandro, Diego,____
> > > >>>>    >
> > > >>>>    >     ____
> > > >>>>    >
> > > >>>>    >     Since you added extension to do OPoT, should we extend
> the
> > > >>>>    model in
> > > >>>>    >     draft-ietf-sfc-proof-of-transit to enable OPoT and any
> > > >>>>    parameters
> > > >>>>    >     required for it  shared masks per link. If yes my
> proposal
> > > >>>>    will be
> > > >>>>    >     to:____
> > > >>>>    >
> > > >>>>    >      1. Augment existing pot-profile with fields to Enable
> OPoT
> > > >>>>    and a
> > > >>>>    >         cipher scheme if needed.____
> > > >>>>    >      2. Separate container in the model to define a map of
> (Node
> > > >>>>    >         link/interface, mask) to distribute pair wise masks=
.
> For
> > > >>>>    e.g.
> > > >>>>    >         Node link/interface identifier can be UUID as
> defined in
> > > >>>>    rfc8348
> > > >>>>    >         Or____
> > > >>>>    >      3. Masks can be part of pot-profile.____
> > > >>>>    >
> > > >>>>    >     ____
> > > >>>>    >
> > > >>>>    >     What do you think about revising the model with this?__=
__
> > > >>>>    >
> > > >>>>    >     ____
> > > >>>>    >
> > > >>>>    >     Thanks,____
> > > >>>>    >
> > > >>>>    >     Shwetha____
> > > >>>>    >
> > > >>>>    >     ____
> > > >>>>    >
> > > >>>>    >     *From: *"Frank Brockners (fbrockne)" <fbrockne@cisco.co=
m
> > > >>>> <mailto:fbrockne@cisco.com>
> > > >>>>    <mailto:fbrockne@cisco.com>
> > > >>>>    >     <mailto:fbrockne@cisco.com <mailto:fbrockne@cisco.com>>=
>
> > > >>>>    >     *Date: *Wednesday, September 11, 2019 at 2:34 PM
> > > >>>>    >     *To: *ALEJANDRO AGUADO MARTIN
> > > >>>>    >     <alejandro.aguadomartin.ext@telefonica.com
> > > >>>> <mailto:alejandro.aguadomartin.ext@telefonica.com>
> > > >>>>    <mailto:alejandro.aguadomartin.ext@telefonica.com>
> > > >>>>    >     <mailto:alejandro.aguadomartin.ext@telefonica.com
> > > >>>>    <mailto:alejandro.aguadomartin..ext@telefonica.com>>>, "Diego
> R.
> > > >>>>    >     Lopez" <diego.r.lopez@telefonica.com
> > > >>>> <mailto:diego.r.lopez@telefonica.com>
> > > >>>>    <mailto:diego.r.lopez@telefonica.com>
> > > >>>>    >     <mailto:diego.r..lopez@telefonica.com
> > > >>>>    <mailto:diego.r..lopez@telefonica.com>>>, Carlos Pignataro
> > > >>>>    >     <cpignata@cisco..com <mailto:cpignata@cisco.com
> > > >>>>    <mailto:cpignata@cisco.com>>>, Shwetha bhandari
> > > >>>>    >     <shwethab@cisco.com <mailto:shwethab@cisco.com>
> > > >>>> <mailto:shwethab@cisco.com>
> > > >>>>    <mailto:shwethab@cisco.com <mailto:shwethab@cisco..com>>>,
> Tal
> > > >>>> Mizrahi
> > > >>>>    >     <tal.mizrahi.phd@gmail.com <mailto:
> tal.mizrahi.phd@gmail.com>
> > > >>>>    <mailto:tal.mizrahi.phd@gmail.com>
> > > >>>>    <mailto:tal.mizrahi.phd@gmail.com
> > > >>>> <mailto:tal.mizrahi.phd@gmail.com>>>
> > > >>>>    >     *Cc: *"a..aguadom@fi.upm.es <mailto:a..aguadom@fi.upm.e=
s>
>
> > > >>>> <mailto:a..aguadom@fi.upm.es>
> > > >>>>    <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>"
> > > >>>>    >     <a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>
> > > >>>> <mailto:a.aguadom@fi.upm.es>
> > > >>>>    <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>>,
> > > >>>>    "sfc@ietf.org <mailto:sfc@ietf.org> <mailto:sfc@ietf.org>
> > > >>>>    >     <mailto:sfc@ietf.org <mailto:sfc@ietf.org>>" <
> sfc@ietf.org
> > > >>>> <mailto:sfc@ietf.org>
> > > >>>>    <mailto:sfc@ietf.org> <mailto:sfc@ietf.org <mailto:
> sfc@ietf.org>>>
> > > >>>>    >     *Subject: *RE: PoT review/comments____
> > > >>>>    >
> > > >>>>    >     ____
> > > >>>>    >
> > > >>>>    >     Hi Alejandro,____
> > > >>>>    >
> > > >>>>    >     ____
> > > >>>>    >
> > > >>>>    >     Thanks again for the review. Your comments have been
> > > >>>>    integrated into
> > > >>>>    >     draft-ietf-sfc-proof-of-transit-03 which just got
> posted.____
> > > >>>>    >
> > > >>>>    >     ____
> > > >>>>    >
> > > >>>>    >     Cheers, Frank____
> > > >>>>    >
> > > >>>>    >     ____
> > > >>>>    >
> > > >>>>    >     *From:*Frank Brockners (fbrockne)
> > > >>>>    >     *Sent:* Montag, 27. Mai 2019 18:18
> > > >>>>    >     *To:* ALEJANDRO AGUADO MARTIN
> > > >>>>    >     <alejandro.aguadomartin.ext@telefonica.com
> > > >>>> <mailto:alejandro.aguadomartin.ext@telefonica.com>
> > > >>>>    <mailto:alejandro.aguadomartin.ext@telefonica.com>
> > > >>>>    >     <mailto:alejandro.aguadomartin.ext@telefonica.com
> > > >>>>    <mailto:alejandro.aguadomartin..ext@telefonica.com>>>; Diego
> R. Lopez
> > > >>>>    >     <diego.r.lopez@telefonica.com
> > > >>>> <mailto:diego.r.lopez@telefonica.com>
> > > >>>>    <mailto:diego.r.lopez@telefonica.com>
> > > >>>>    >     <mailto:diego.r.lopez@telefonica.com
> > > >>>>    <mailto:diego.r.lopez@telefonica.com>>>; Carlos Pignataro
> (cpignata)
> > > >>>>    >     <cpignata@cisco.com <mailto:cpignata@cisco.com>
> > > >>>> <mailto:cpignata@cisco.com>
> > > >>>>    <mailto:cpignata@cisco.com <mailto:cpignata@cisco..com>>>;
> Shwetha
> > > >>>>    Bhandari
> > > >>>>    >     (shwethab) <shwethab@cisco.com <mailto:
> shwethab@cisco.com>
> > > >>>> <mailto:shwethab@cisco.com>
> > > >>>>    <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com>>>; Tal
> > > >>>>    >     Mizrahi <tal.mizrahi.phd@gmail.com
> > > >>>> <mailto:tal.mizrahi.phd@gmail.com>
> > > >>>>    <mailto:tal.mizrahi.phd@gmail..com>
> > > >>>>    <mailto:tal.mizrahi.phd@gmail.com
> > > >>>> <mailto:tal.mizrahi.phd@gmail.com>>>
> > > >>>>    >     *Cc:* a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>
> > > >>>> <mailto:a.aguadom@fi.upm.es>
> > > >>>>    <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>;
> > > >>>> sfc@ietf.org <mailto:sfc@ietf.org> <mailto:sfc@ietf.org>
> > > >>>>    >     <mailto:sfc@ietf.org <mailto:sfc@ietf.org>>
> > > >>>>    >     *Subject:* RE: PoT review/comments____
> > > >>>>    >
> > > >>>>    >     ____
> > > >>>>    >
> > > >>>>    >     Hi Alejandro,____
> > > >>>>    >
> > > >>>>    >     ____
> > > >>>>    >
> > > >>>>    >     Many thanks for the comments =E2=80=93 and sorry for th=
e delay =E2=80=93
> > > >>>>    >     unfortunately your email somehow got dropped from my
> todo list.
> > > >>>>    >     Please see inline=E2=80=A6____
> > > >>>>    >
> > > >>>>    >     ____
> > > >>>>    >
> > > >>>>    >     (cc=E2=80=99ing the list as well).____
> > > >>>>    >
> > > >>>>    >     ____
> > > >>>>    >
> > > >>>>    >     *From:*ALEJANDRO AGUADO MARTIN
> > > >>>>    >     <alejandro.aguadomartin..ext@telefonica.com
> > > >>>> <mailto:alejandro.aguadomartin..ext@telefonica.com>
> > > >>>>    <mailto:alejandro.aguadomartin..ext@telefonica.com>
> > > >>>>    >     <mailto:alejandro.aguadomartin.ext@telefonica.com
> > > >>>>    <mailto:alejandro.aguadomartin..ext@telefonica.com>>>
> > > >>>>    >     *Sent:* Montag, 15. April 2019 17:27
> > > >>>>    >     *To:* Diego R. Lopez <diego.r.lopez@telefonica.com
> > > >>>> <mailto:diego.r.lopez@telefonica.com>
> > > >>>>    <mailto:diego.r.lopez@telefonica.com>
> > > >>>>    >     <mailto:diego.r.lopez@telefonica.com
> > > >>>>    <mailto:diego.r.lopez@telefonica.com>>>; Carlos Pignataro
> (cpignata)
> > > >>>>    >     <cpignata@cisco.com <mailto:cpignata@cisco.com>
> > > >>>> <mailto:cpignata@cisco.com>
> > > >>>>    <mailto:cpignata@cisco.com <mailto:cpignata@cisco..com>>>;
> Frank
> > > >>>>    Brockners
> > > >>>>    >     (fbrockne) <fbrockne@cisco.com <mailto:
> fbrockne@cisco.com>
> > > >>>> <mailto:fbrockne@cisco.com>
> > > >>>>    <mailto:fbrockne@cisco.com <mailto:fbrockne@cisco.com>>>;
> Shwetha
> > > >>>>    >     Bhandari (shwethab) <shwethab@cisco.com
> > > >>>> <mailto:shwethab@cisco.com>
> > > >>>>    <mailto:shwethab@cisco.com>
> > > >>>>    >     <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com
> >>>;
> > > >>>>    Tal Mizrahi <tal.mizrahi.phd@gmail.com
> > > >>>> <mailto:tal.mizrahi.phd@gmail.com>
> > > >>>>    <mailto:tal.mizrahi.phd@gmail.com>
> > > >>>>    >     <mailto:tal.mizrahi.phd@gmail.com
> > > >>>>    <mailto:tal.mizrahi.phd@gmail.com>>>
> > > >>>>    >     *Cc:* a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>
> > > >>>> <mailto:a.aguadom@fi.upm.es>
> > > >>>>    <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>
> > > >>>>    >     *Subject:* PoT review/comments____
> > > >>>>    >
> > > >>>>    >     ____
> > > >>>>    >
> > > >>>>    >     Dear all,____
> > > >>>>    >
> > > >>>>    >     ____
> > > >>>>    >
> > > >>>>    >     I gave a quick review to the PoT document. Some
> comments:____
> > > >>>>    >
> > > >>>>    >     ____
> > > >>>>    >
> > > >>>>    >     - I read =E2=80=9CThe non-constant coefficients are use=
d to
> > > >>>> generate the
> > > >>>>    >     Lagrange Polynomial Constants (LPC).=E2=80=9D As far as=
 I
> > > >>>>    understood, the
> > > >>>>    >     points assigned to each node (Xi) are the ones used for
> > > >>>>    generating
> > > >>>>    >     the LPCi, aren=E2=80=99t they?____
> > > >>>>    >
> > > >>>>    >     */=E2=80=A6FB: Good catch. The LPCs are of course compu=
ted using
> (x_i,
> > > >>>>    >     y_i)./*____
> > > >>>>    >
> > > >>>>    >     - If we go for including the YANG in the current docume=
nt
> > > >>>>    (which I
> > > >>>>    >     agree), parameters should be described before the yang
> > > >>>>    definition,
> > > >>>>    >     and maybe it would be helpful to have the yang tree (se=
e
> the
> > > >>>>    current
> > > >>>>    >     version attached).____
> > > >>>>    >
> > > >>>>    >     */=E2=80=A6FB: Thanks. IMHO it makes sense to keep the =
YANG
> model
> > > >>>> in the
> > > >>>>    >     current doc, given that the model and the description g=
o
> > > >>>> hand in
> > > >>>>    >     hand. We can of course also include the yang tree to ma=
ke
> > > >>>>    reading
> > > >>>>    >     easier. This is consistent with other documents which
> > > >>>>    specify YANG
> > > >>>>    >     models./*____
> > > >>>>    >
> > > >>>>    >     - I include in the attached file few questions about
> naming
> > > >>>>    of some
> > > >>>>    >     parameters.____
> > > >>>>    >
> > > >>>>    >     *//*____
> > > >>>>    >
> > > >>>>    >     */=E2=80=A6FB:
> > > >>>>    >     - naming F_i(x_i, y_i) =E2=80=93 I agree that a better =
name
> could be
> > > >>>>    used.
> > > >>>>    >     The only potential concern would be that the open sourc=
e
> > > >>>>    >     implementation in OpenDaylight uses this naming =E2=80=
=93
> changing
> > > >>>>    it might
> > > >>>>    >     lead to confusion.. We can start with adding a comment
> to make
> > > >>>>    >     things clearer./*____
> > > >>>>    >
> > > >>>>    >     *//*____
> > > >>>>    >
> > > >>>>    >     */- secret key =E2=80=93 this is the constant part of t=
he first
> > > >>>>    polynomial
> > > >>>>    >     which serves as the secret =E2=80=93 and which is re-re=
trieved.
> > > >>>>    Again, we
> > > >>>>    >     can update the description to make things clearer./*___=
_
> > > >>>>    >
> > > >>>>    >     *//*____
> > > >>>>    >
> > > >>>>    >     */- size of the random number: This is unrelated to OPO=
T.
> > > >>>>    The random
> > > >>>>    >     number is to uniquely identify a packet. There is a
> trade-off
> > > >>>>    >     between the size of the random number and how often you
> need to
> > > >>>>    >     re-key your system. At high speeds, the random number =
=E2=80=93
> which
> > > >>>>    >     identifies a particular packet =E2=80=93 is used up qui=
te
> quickly if
> > > >>>>    it is
> > > >>>>    >     only 32-bit wide. See section 4
> > > >>>>    >
> > > >>>>        /*
> https://tools.ietf.org/html/draft-ietf-sfc-proof-of-transit-02#section-4_=
___
> > > >>>>    >
> > > >>>>    >     *//*____
> > > >>>>    >
> > > >>>>    >     */- number of profiles: For a deployment which is
> expected
> > > >>>>    to renew
> > > >>>>    >     keys every now and then (e.g. you run with 32-bit rando=
m
> > > >>>>    numbers at
> > > >>>>    >     reasonably high speeds), you need at least 2 profiles =
=E2=80=93
> an
> > > >>>>    active
> > > >>>>    >     one and one that you can activate once you run out of
> random
> > > >>>>    numbers
> > > >>>>    >     (which is what the encapsulating node would decide)..
> /*____
> > > >>>>    >
> > > >>>>    >     - I have checked some of the existing YANG files within
> the
> > > >>>>    IETF to
> > > >>>>    >     see in which it would be helpful to include. From the
> (not
> > > >>>>    so) old
> > > >>>>    >     OpenFlow, I assume that one match is necessary (for
> > > >>>> identify the
> > > >>>>    >     iOAM/PoT header) whilst the source node can use any
> existing
> > > >>>>    match
> > > >>>>    >     field to identify packets where to apply the PoT scheme=
.
> In
> > > >>>>    terms of
> > > >>>>    >     actions, I would say that two may be required: for any
> node, an
> > > >>>>    >     update-pot is necessary, while the verifier would need =
a
> > > >>>>    verify-pot
> > > >>>>    >     type of action, that would ideally either remove the
> header
> > > >>>>    or drop
> > > >>>>    >     the packet if fails (I do not know if you are thinking
> in more
> > > >>>>    >     complex scenarios).____
> > > >>>>    >
> > > >>>>    >     *//*____
> > > >>>>    >
> > > >>>>    >     */=E2=80=A6FB: From an OF perspective, that sounds feas=
ible..
> That
> > > >>>>    said, we
> > > >>>>    >     probably want to avoid making the spec specific to a
> > > >>>>    technology like
> > > >>>>    >     OF, hence would suggest that we don=E2=80=99t specify s=
uch a
> > > >>>> behavior as
> > > >>>>    >     part of this document./*____
> > > >>>>    >
> > > >>>>    >     *//*____
> > > >>>>    >
> > > >>>>    >     - For this last point, I have seen the definitions with=
in
> > > >>>>    >     draft-asechoud-rtgwg-qos-model-08, where matched could
> map
> > > >>>>    (if I am
> > > >>>>    >     not wrong) to classifiers/filters, and actions to
> actions. I
> > > >>>>    send
> > > >>>>    >     you the models in a zip file. In this sense the model t=
o
> be
> > > >>>>    defined
> > > >>>>    >     in the PoT shall be an augment of the models defined in
> that
> > > >>>>    >     document. I have not done a very deep revision on the
> model,
> > > >>>>    but I
> > > >>>>    >     think it could fit there. If you have check this or oth=
er
> > > >>>>    models,
> > > >>>>    >     let me know so I could also help.____
> > > >>>>    >
> > > >>>>    >     *//*____
> > > >>>>    >
> > > >>>>    >     */=E2=80=A6FB: Per my note above: In order to keep POT =
generic
> and
> > > >>>>    not link
> > > >>>>    >     it to a particular classification mechanism, I=E2=80=99=
d prefer
> to
> > > >>>>    keep the
> > > >>>>    >     classification question as out of scope for the current
> > > >>>>    document.
> > > >>>>    >     That way it can also apply to technologies which come
> with
> > > >>>>    their own
> > > >>>>    >     way to classify =E2=80=93 and which might fully decoupl=
e the
> tunneling
> > > >>>>    >     aspects from the classification aspects. /*____
> > > >>>>    >
> > > >>>>    >     ____
> > > >>>>    >
> > > >>>>    >     Thanks a lot and sorry for such long email.____
> > > >>>>    >
> > > >>>>    >     ____
> > > >>>>    >
> > > >>>>    >     */..FB: Thanks again for all your comments. We=E2=80=99=
ll get
> them
> > > >>>>    included
> > > >>>>    >     in the next revision. /*____
> > > >>>>    >
> > > >>>>    >     *//*____
> > > >>>>    >
> > > >>>>    >     */Cheers, Frank/*____
> > > >>>>    >
> > > >>>>    >     ____
> > > >>>>    >
> > > >>>>    >     ____
> > > >>>>    >
> > > >>>>    >     ____
> > > >>>>    >
> > > >>>>    >     Best,____
> > > >>>>    >
> > > >>>>    >     Alejandro____
> > > >>>>    >
> > > >>>>    >     ____
> > > >>>>    >
> > > >>>>    >     ____
> > > >>>>    >
> > > >>>>    >     ____
> > > >>>>    >
> > > >>>>    >     ____
> > > >>>>    >
> > > >>>>    >
> > > >>>>
> ------------------------------------------------------------------------
> > > >>>>    >
> > > >>>>    >
> > > >>>>    >     Este mensaje y sus adjuntos se dirigen exclusivamente a
> su
> > > >>>>    >     destinatario, puede contener informaci=C3=B3n privilegi=
ada o
> > > >>>>    confidencial
> > > >>>>    >     y es para uso exclusivo de la persona o entidad de
> destino.
> > > >>>>    Si no es
> > > >>>>    >     usted. el destinatario indicado, queda notificado de qu=
e
> la
> > > >>>>    lectura,
> > > >>>>    >     utilizaci=C3=B3n, divulgaci=C3=B3n y/o copia sin autori=
zaci=C3=B3n
> puede estar
> > > >>>>    >     prohibida en virtud de la legislaci=C3=B3n vigente. Si =
ha
> > > >>>>    recibido este
> > > >>>>    >     mensaje por error, le rogamos que nos lo comunique
> > > >>>>    inmediatamente
> > > >>>>    >     por esta misma v=C3=ADa y proceda a su destrucci=C3=B3n=
.
> > > >>>>    >
> > > >>>>    >     The information contained in this transmission is
> > > >>>> privileged and
> > > >>>>    >     confidential information intended only for the use of t=
he
> > > >>>>    individual
> > > >>>>    >     or entity named above. If the reader of this message is
> not the
> > > >>>>    >     intended recipient, you are hereby notified that any
> > > >>>>    dissemination,
> > > >>>>    >     distribution or copying of this communication is strict=
ly
> > > >>>>    >     prohibited. If you have received this transmission in
> error,
> > > >>>>    do not
> > > >>>>    >     read it. Please immediately reply to the sender that yo=
u
> have
> > > >>>>    >     received this communication in error and then delete it=
.
> > > >>>>    >
> > > >>>>    >     Esta mensagem e seus anexos se dirigem exclusivamente a=
o
> seu
> > > >>>>    >     destinat=C3=A1rio, pode conter informa=C3=A7=C3=A3o pri=
vilegiada ou
> > > >>>>    confidencial e
> > > >>>>    >     =C3=A9 para uso exclusivo da pessoa ou entidade de dest=
ino.
> Se n=C3=A3o =C3=A9
> > > >>>>    >     vossa senhoria o destinat=C3=A1rio indicado, fica notif=
icado
> de
> > > >>>> que a
> > > >>>>    >     leitura, utiliza=C3=A7=C3=A3o, divulga=C3=A7=C3=A3o e/o=
u c=C3=B3pia sem
> autoriza=C3=A7=C3=A3o pode
> > > >>>>    >     estar proibida em virtude da legisla=C3=A7=C3=A3o vigen=
te. Se
> recebeu
> > > >>>> esta
> > > >>>>    >     mensagem por erro, rogamos-lhe que nos o comunique
> > > >>>>    imediatamente por
> > > >>>>    >     esta mesma via e proceda a sua destrui=C3=A7=C3=A3o____
> > > >>>>    >
> > > >>>>    >     _______________________________________________
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>

--000000000000f2d66d05a2430c37
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Dear Carlos,<div>I believe that Joel has expressed it clea=
rly and I concur with his reasoning.</div><div><br></div><div>Regards,</div=
><div>Greg</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=
=3D"gmail_attr">On Wed, Apr 1, 2020 at 4:13 PM Carlos Pignataro (cpignata) =
&lt;<a href=3D"mailto:cpignata@cisco.com">cpignata@cisco.com</a>&gt; wrote:=
<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8=
ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Dear Greg,<br>
<br>
This seems to be a rephrase of the previous email, yet I still do not follo=
w the cause-effect in your argument.<br>
<br>
Normative does not mean =E2=80=9Ca reference that defines technology within=
 the same Working Group=E2=80=99s documents that can be used=E2=80=9D.<br>
<br>
The definition and clarification statement at [1] says =E2=80=9Cdocuments t=
hat must be read to understand or implement the technology in the new RFC=
=E2=80=9D. It does not speak to WG charters or.<br>
<br>
Is the technology in draft-ietf-sfc-ioam-nsh a =E2=80=9Cmust=E2=80=9D for d=
raft-ietf-sfc-proof-of-transit? It seems to me that the only =E2=80=9Cmust=
=E2=80=9D technology is ippm-ioam-data. I appreciate that this is also not =
necessarily a yes/no binary answer...<br>
<br>
[Again, I am OK either way, for the right reason]<br>
<br>
Carlos.<br>
<br>
[1] <a href=3D"https://www.ietf.org/about/groups/iesg/statements/normative-=
informative-references/" rel=3D"noreferrer" target=3D"_blank">https://www.i=
etf.org/about/groups/iesg/statements/normative-informative-references/</a><=
br>
<br>
<br>
&gt; 2020/04/01 =E5=8D=88=E5=BE=8C3:36=E3=80=81Greg Mirsky &lt;<a href=3D"m=
ailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.com</a>&gt=
;=E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:<br>
&gt; <br>
&gt; Dear Carlos,<br>
&gt; in my previous note I have recognized that POT, as SFC, can be realize=
d using different techniques. But this is SFC WG document and, as I underst=
and the charter of SFC WG, we&#39;re defining technologies that use SFC NSH=
. Hence my conclusion that the reference to draft-ietf-sfc-ioam-nsh should =
be normative, as that is the only document that defines iOAM encapsulation =
in NSH. Making the reference informational could be interpreted as suggesti=
on that POT in SFC NSH might be encapsulated not as iOAM but in some other =
manner. And while that is possible, I don&#39;t see a proposal that describ=
es such alternative encapsulation. So, it appears that the WG has agreed th=
at POT in SFC NSH should use encapsulation as defined in draft-ietf-sfc-ioa=
m-nsh. <br>
&gt; <br>
&gt; Regards,<br>
&gt; Greg<br>
&gt; <br>
&gt; On Wed, Apr 1, 2020 at 12:16 PM Carlos Pignataro (cpignata) &lt;<a hre=
f=3D"mailto:cpignata@cisco.com" target=3D"_blank">cpignata@cisco.com</a>&gt=
; wrote:<br>
&gt; Dear Greg,<br>
&gt; <br>
&gt; &gt; 2020/04/01 =E5=8D=88=E5=BE=8C2:59=E3=80=81Greg Mirsky &lt;<a href=
=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.com</=
a>&gt;=E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:<br>
&gt; &gt; <br>
&gt; &gt; Dear All,<br>
&gt; &gt; I agree with Joel that the reference in draft-ietf-sfc-proof-of-t=
ransit to draft-ietf-ippm-ioam-data should be normative.<br>
&gt; <br>
&gt; Great. Everyone seems to be aligned on this point.<br>
&gt; <br>
&gt; <br>
&gt; &gt; I also support the proposal to add in draft-ietf-sfc-proof-of-tra=
nsit a normative reference to draft-ietf-sfc-ioam-nsh. SFC WG is working on=
 defining SFC that is based on NSH (SFC NSH), and while SFC might be realiz=
ed using other techniques, draft-ietf-sfc-ioam-nsh is, and likely will rema=
in, the only document that is describing iOAM encapsulation in SFC NSH. Thu=
s, I believe, for SFC WG, implementation of PoT based on iOAM requires impl=
ementation of iOAM encapsulation in SFC NSH, as defined in draft-ietf-sfc-i=
oam-nsh. Hence, the reference must be normative.<br>
&gt; <br>
&gt; <br>
&gt; This logic is flawed in the onset. The main point is that POT can be r=
ealized with a variety of transports and technologies and use-cases, one of=
 which is SFC, and then further within SFC one of which is NSH. <br>
&gt; <br>
&gt; You seem to argue that NSH is somehow in practice the only SFC realiza=
tion, and because of that the reference =E2=80=9Cmust be normative=E2=80=9D=
.<br>
&gt; <br>
&gt; I disagree with the premise, but regardless, it does not matter since =
POT applies to other non-SFC(-non-NSH) technologies. Therefore that since-t=
hen logic does not apply.<br>
&gt; <br>
&gt; Copying the very first sentence of the Abstract:<br>
&gt; <br>
&gt;=C2=A0 =C2=A0 Several technologies such as Traffic Engineering (TE), Se=
rvice<br>
&gt;=C2=A0 =C2=A0 Function Chaining (SFC), and policy based routing [...]<b=
r>
&gt; <br>
&gt; <br>
&gt; And now looking at this fragment, I am more convinced that this is one=
 example and as such Informative. <br>
&gt; <br>
&gt; I would not object to Normative for the right reasons, but the reason =
above, in my mind, does not follow.<br>
&gt; <br>
&gt; Thanks,<br>
&gt; <br>
&gt; Carlos.<br>
&gt; <br>
&gt; <br>
&gt; &gt; <br>
&gt; &gt; Regards,<br>
&gt; &gt; Greg<br>
&gt; &gt; <br>
&gt; &gt; On Tue, Mar 24, 2020 at 2:25 PM Joel M. Halpern &lt;<a href=3D"ma=
ilto:jmh@joelhalpern.com" target=3D"_blank">jmh@joelhalpern.com</a>&gt; wro=
te:<br>
&gt; &gt; I think we all agree that draft-ietf-sfc-proof-of-transit require=
s the <br>
&gt; &gt; normative reference to draft-ietf-ippm-ioam-data.<br>
&gt; &gt; <br>
&gt; &gt; Regarding a reference from draft-ietf-sfc-proof-of-transit to <br=
>
&gt; &gt; draft-ietf-sfc-ioam-nsh, I think we agree that it is needed.=C2=
=A0 The <br>
&gt; &gt; question then is normative or informative.=C2=A0 If we use the us=
ual IETF <br>
&gt; &gt; rule that there has to be a defined normative way to interoperabl=
y <br>
&gt; &gt; implement a protocol spec (with other options allowed), my inclin=
ation <br>
&gt; &gt; is that the reference should be normative.<br>
&gt; &gt; <br>
&gt; &gt; Regarding the informative reference in the other direction from <=
br>
&gt; &gt; draft-ietf-sfc-ioam-nsh to draft-ietf-sfc-proof-of-transit, while=
 I <br>
&gt; &gt; personally like the idea, that is up to you / the working group.<=
br>
&gt; &gt; <br>
&gt; &gt; Yours,<br>
&gt; &gt; Joel<br>
&gt; &gt; <br>
&gt; &gt; On 3/24/2020 5:20 PM, Carlos Pignataro (cpignata) wrote:<br>
&gt; &gt; &gt; Hi, Joel,<br>
&gt; &gt; &gt; <br>
&gt; &gt; &gt; The way in which the doc hierarchy and relationship is struc=
ture seems <br>
&gt; &gt; &gt; to support and potentially even require:<br>
&gt; &gt; &gt; <br>
&gt; &gt; &gt; From draft-ietf-sfc-proof-of-transit:<br>
&gt; &gt; &gt; * A normative reference to [I-D.ietf-ippm-ioam-data], since =
PoT gives <br>
&gt; &gt; &gt; over IOAM explicitly, and that exists.<br>
&gt; &gt; &gt; * Optionally, an Informative reference to draft-ietf-sfc-ioa=
m-nsh, since <br>
&gt; &gt; &gt; that=E2=80=99s really one out of many ways to carry IOAM ove=
r NSH, but separated <br>
&gt; &gt; &gt; by document indirection. This does not exist but can be adde=
d.<br>
&gt; &gt; &gt; <br>
&gt; &gt; &gt;=C2=A0 From draft-ietf-sfc-ioam-nsh:<br>
&gt; &gt; &gt; * Optionally, an Informative reference to <br>
&gt; &gt; &gt; draft-ietf-sfc-proof-of-transit, since that=E2=80=99s one ou=
t of many <br>
&gt; &gt; &gt; applications. This does not exist but can be added.<br>
&gt; &gt; &gt; <br>
&gt; &gt; &gt; Thoughts?<br>
&gt; &gt; &gt; <br>
&gt; &gt; &gt; Best,<br>
&gt; &gt; &gt; <br>
&gt; &gt; &gt; Carlos.<br>
&gt; &gt; &gt; <br>
&gt; &gt; &gt;&gt; 2020/03/24 =E5=8D=88=E5=BE=8C5:10=E3=80=81Joel M. Halper=
n &lt;<a href=3D"mailto:jmh@joelhalpern.com" target=3D"_blank">jmh@joelhalp=
ern.com</a> <br>
&gt; &gt; &gt;&gt; &lt;mailto:<a href=3D"mailto:jmh@joelhalpern.com" target=
=3D"_blank">jmh@joelhalpern.com</a>&gt;&gt;=E3=81=AE=E3=83=A1=E3=83=BC=E3=
=83=AB:<br>
&gt; &gt; &gt;&gt;<br>
&gt; &gt; &gt;&gt; Carlos, it sounds like there should probably be a normat=
ive reference <br>
&gt; &gt; &gt;&gt; from draft-ietf-sfc-proof of transit to draft-ietf-sfc-i=
oam-nsh? <br>
&gt; &gt; &gt;&gt; Possibly in the same sentence that refers to draft-ietf-=
ippm-ioam-data?<br>
&gt; &gt; &gt;&gt;<br>
&gt; &gt; &gt;&gt; Yours,<br>
&gt; &gt; &gt;&gt; Joel<br>
&gt; &gt; &gt;&gt;<br>
&gt; &gt; &gt;&gt; On 3/24/2020 4:54 PM, Carlos Pignataro (cpignata) wrote:=
<br>
&gt; &gt; &gt;&gt;&gt; Greg,<br>
&gt; &gt; &gt;&gt;&gt; The very first sentence of the PoT document reads:<b=
r>
&gt; &gt; &gt;&gt;&gt;=C2=A0 =C2=A0 Several technologies such as Traffic En=
gineering (TE), Service<br>
&gt; &gt; &gt;&gt;&gt;=C2=A0 =C2=A0 Function Chaining (SFC), and policy bas=
ed routing are used to steer<br>
&gt; &gt; &gt;&gt;&gt;=C2=A0 =C2=A0 traffic through a specific, user-define=
d path.=C2=A0 This document defines<br>
&gt; &gt; &gt;&gt;&gt; Explaining how this document is applicable to variou=
s <br>
&gt; &gt; &gt;&gt;&gt; traffic-steering technologies.<br>
&gt; &gt; &gt;&gt;&gt; Section 3 then explains:<br>
&gt; &gt; &gt;&gt;&gt;=C2=A0 =C2=A0 The POT information is encapsulated in =
packets as an IOAM Proof Of<br>
&gt; &gt; &gt;&gt;&gt;=C2=A0 =C2=A0 Transit Option.=C2=A0 The details and f=
ormat of the encapsulation and the<br>
&gt; &gt; &gt;&gt;&gt;=C2=A0 =C2=A0 POT Option format are specified in [I-D=
.ietf-ippm-ioam-data].<br>
&gt; &gt; &gt;&gt;&gt; Which shows how to carry PoT in IOAM, with an approp=
riate pointer.<br>
&gt; &gt; &gt;&gt;&gt; Lastly, draft-ietf-sfc-ioam-nsh-03 defines IOAM over=
 an NSH <br>
&gt; &gt; &gt;&gt;&gt; encapsulation.<br>
&gt; &gt; &gt;&gt;&gt; This arrangements maximizes specification modularity=
 and <br>
&gt; &gt; &gt;&gt;&gt; portability/reusability.<br>
&gt; &gt; &gt;&gt;&gt; Best,<br>
&gt; &gt; &gt;&gt;&gt; Carlos.<br>
&gt; &gt; &gt;&gt;&gt;&gt; 2020/03/24 =E5=8D=88=E5=BE=8C4:48=E3=80=81Greg M=
irsky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregim=
irsky@gmail.com</a> <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:gregimirsky@gmail.c=
om" target=3D"_blank">gregimirsky@gmail.com</a>&gt; &lt;mailto:<a href=3D"m=
ailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.com</a>&gt=
;&gt;=E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:<br>
&gt; &gt; &gt;&gt;&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt; Hi Joel,<br>
&gt; &gt; &gt;&gt;&gt;&gt; thank you for the most expedient response. As I =
understand it, iOAM <br>
&gt; &gt; &gt;&gt;&gt;&gt; Data draft describes the format of the informati=
onal element that <br>
&gt; &gt; &gt;&gt;&gt;&gt; carries POT-related information but it does not =
define how the <br>
&gt; &gt; &gt;&gt;&gt;&gt; element to be carried in case of NSH encapsulati=
on. And that is what <br>
&gt; &gt; &gt;&gt;&gt;&gt; I was asking, apologies for not being clear in m=
y first note.<br>
&gt; &gt; &gt;&gt;&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt; Regards,<br>
&gt; &gt; &gt;&gt;&gt;&gt; Greg<br>
&gt; &gt; &gt;&gt;&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt; On Tue, Mar 24, 2020 at 1:42 PM Joel M.. Halpern=
 <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;<a href=3D"mailto:jmh@joelhalpern.com" targe=
t=3D"_blank">jmh@joelhalpern.com</a> &lt;mailto:<a href=3D"mailto:jmh@joelh=
alpern.com" target=3D"_blank">jmh@joelhalpern.com</a>&gt; <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:jmh@joelhalpern.com=
" target=3D"_blank">jmh@joelhalpern.com</a>&gt;&gt; wrote:<br>
&gt; &gt; &gt;&gt;&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Regarding the information carriage,=
 the PoT document points to the<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 IOAM<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 document.<br>
&gt; &gt; &gt;&gt;&gt;&gt; <a href=3D"https://tools.ietf.org/html/draft-iet=
f-ippm-ioam-data-08#section-4.5" rel=3D"noreferrer" target=3D"_blank">https=
://tools.ietf.org/html/draft-ietf-ippm-ioam-data-08#section-4.5</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 gives the format (and ways to have =
other formats if needed.)<br>
&gt; &gt; &gt;&gt;&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Yours,<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Joel<br>
&gt; &gt; &gt;&gt;&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 On 3/24/2020 4:26 PM, Greg Mirsky w=
rote:<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; Hi Frank,<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; thank you for reminding us abo=
ut this important work, indeed we<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 should<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; complete it. I&#39;ve reviewed=
 the draft and have several questions.<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Please<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; kindly consider:<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0* I couldn&#39;t f=
ind information where, relative to NSH, RND and<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 CML are<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0transported=
<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0* for YANG data mo=
dels using &quot;reference&quot; is strongly<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 encouraged as it<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0provides a =
pointer to the specification. Since the POT data<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 model is<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0in the same=
 document as the POT specification, listing the<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0appropriate=
 section should suffice<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; Regards,<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; Greg<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; On Thu, Mar 19, 2020 at 6:45 A=
M Frank Brockners (fbrockne)<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; &lt;fbrockne=3D<a href=3D"mail=
to:40cisco.com@dmarc.ietf.org" target=3D"_blank">40cisco.com@dmarc.ietf.org=
</a> <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:fbrockne" target=3D=
"_blank">fbrockne</a>=3D<a href=3D"mailto:40cisco.com@dmarc.ietf.org" targe=
t=3D"_blank">40cisco.com@dmarc.ietf.org</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:40cisc=
o.com@dmarc.ietf.org" target=3D"_blank">40cisco.com@dmarc.ietf.org</a>&gt;<=
br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; &lt;mailto:<a href=3D"mailto:4=
0cisco.com@dmarc.ietf.org" target=3D"_blank">40cisco.com@dmarc.ietf.org</a>=
<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:40cisc=
o.com@dmarc.ietf.org" target=3D"_blank">40cisco.com@dmarc.ietf.org</a>&gt;&=
gt;&gt; wrote:<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Dear SFC WG=
,____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0It=E2=80=99=
s been a while since we posted<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 draft-ietf-sfc-proof-of-transit-04<=
br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0which addre=
ssed all known comments =E2=80=93 see below.<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0I=E2=80=99v=
e not seen any more recent comments or questions come up<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 =E2=80=93 and<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0we=E2=80=99=
ve been through quite a few discussions and reviews of this<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0document al=
ready.____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Thus the qu=
estion: Are we ready for WG LC?____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Thanks, Fra=
nk____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*From:* Fra=
nk Brockners (fbrockne)<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Sent:* Don=
nerstag, 21. November 2019 08:21<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*To:* Aleja=
ndro Aguado FI &lt;<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank"=
>a.aguadom@fi.upm.es</a> <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es=
" target=3D"_blank">a.aguadom@fi.upm.es</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:a.agua=
dom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.e=
s</a> &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a=
.aguadom@fi.upm.es</a>&gt;&gt;&gt;;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Diego R. Lopez<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=
=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@te=
lefonica.com</a> <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:diego.r.lopez@telef=
onica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.=
r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&=
gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_blank">diego.r.l=
opez@telefonica.com</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.=
r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&=
gt;&gt;&gt;; Carlos Pignataro (cpignata)<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=
=3D"mailto:cpignata@cisco.com" target=3D"_blank">cpignata@cisco.com</a> &lt=
;mailto:<a href=3D"mailto:cpignata@cisco.com" target=3D"_blank">cpignata@ci=
sco.com</a>&gt; <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:cpignata@cisco.com"=
 target=3D"_blank">cpignata@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:cpigna=
ta@cisco.com" target=3D"_blank">cpignata@cisco.com</a> &lt;mailto:<a href=
=3D"mailto:cpignata@cisco." target=3D"_blank">cpignata@cisco.</a>.com&gt;&g=
t;&gt;;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 ALEJANDRO AGUADO<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0MARTIN &lt;=
<a href=3D"mailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_bla=
nk">alejandro.aguadomartin.ext@telefonica.com</a> <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:alejandro.aguadomar=
tin.ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin.ext@telefo=
nica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejan=
dro.aguadomartin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomar=
tin..ext@telefonica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_bla=
nk">alejandro.aguadomartin.ext@telefonica.com</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejan=
dro.aguadomartin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomar=
tin..ext@telefonica.com</a>&gt;&gt;&gt;; Shwetha<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Bhandari (s=
hwethab) &lt;<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shweth=
ab@cisco.com</a> <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:shwethab@cisco.com"=
 target=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:shweth=
ab@cisco.com" target=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com<=
/a> &lt;mailto:<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwe=
thab@cisco.com</a>&gt;&gt;&gt;;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Tal Mizrahi &lt;<a href=3D"mailto:t=
al.mizrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a> <=
br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:tal.mizrahi.phd@gma=
il.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mi=
zrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br=
>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:tal.mizrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.=
phd@gmail.com</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mi=
zrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;&gt=
;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Cc:* <a hr=
ef=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a=
 href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt; &lt;ma=
ilto:<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt;=
<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:sfc@ie=
tf.org" target=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a href=3D"mailto:sfc=
@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Subject:* =
RE: PoT review/comments____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0We=E2=80=99=
ve just posted revision -04 of<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 draft-ietf-sfc-proof-of-transit<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0which now i=
ncludes support for OPOT configuration in the<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 yang model;____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0see section=
 5.2.3 in<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; <a href=3D"https://www.ietf.or=
g/id/draft-ietf-sfc-proof-of-transit-04.txt" rel=3D"noreferrer" target=3D"_=
blank">https://www.ietf.org/id/draft-ietf-sfc-proof-of-transit-04.txt</a>. =
<br>
&gt; &gt; &gt;&gt;&gt;&gt; ____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0The main ad=
dition is a grouping opot-profile, which adds<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 upstream<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0and downstr=
eam masks that OPOT requires.____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Thanks to A=
lejandro for suggesting these updates.____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0This fixes =
the last =E2=80=9Cknown issue=E2=80=9D in<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0draft-ietf-=
sfc-proof-of-transit. It would be great if you<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 could give<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0the documen=
t another careful read through.<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Are we read=
y for WGLC?____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Thanks, Fra=
nk____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*From:* Ale=
jandro Aguado FI &lt;<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blan=
k">a.aguadom@fi.upm.es</a> <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es=
" target=3D"_blank">a.aguadom@fi.upm.es</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:a..agu=
adom@fi.upm.es" target=3D"_blank">a..aguadom@fi.upm.es</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.e=
s</a> &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a=
.aguadom@fi.upm.es</a>&gt;&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Sent:* Don=
nerstag, 12. September 2019 15:40<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*To:* Diego=
 R. Lopez &lt;<a href=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_bl=
ank">diego.r.lopez@telefonica.com</a> <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:diego.r.lopez@telef=
onica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.=
r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&=
gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_blank">diego.r.l=
opez@telefonica.com</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.=
r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&=
gt;&gt;&gt;; Carlos Pignataro (cpignata)<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=
=3D"mailto:cpignata@cisco.com" target=3D"_blank">cpignata@cisco.com</a> &lt=
;mailto:<a href=3D"mailto:cpignata@cisco.com" target=3D"_blank">cpignata@ci=
sco.com</a>&gt; <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:cpignata@cisco.com"=
 target=3D"_blank">cpignata@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:cpigna=
ta@cisco.com" target=3D"_blank">cpignata@cisco.com</a> &lt;mailto:<a href=
=3D"mailto:cpignata@cisco." target=3D"_blank">cpignata@cisco.</a>.com&gt;&g=
t;&gt;; Frank<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Brockners<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0(fbrockne) =
&lt;<a href=3D"mailto:fbrockne@cisco.com" target=3D"_blank">fbrockne@cisco.=
com</a> &lt;mailto:<a href=3D"mailto:fbrockne@cisco.com" target=3D"_blank">=
fbrockne@cisco.com</a>&gt; <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:fbrockne@cisco.com"=
 target=3D"_blank">fbrockne@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:fbrock=
ne@cisco.com" target=3D"_blank">fbrockne@cisco.com</a> &lt;mailto:<a href=
=3D"mailto:fbrockne@cisco.com" target=3D"_blank">fbrockne@cisco.com</a>&gt;=
&gt;&gt;;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0ALEJANDRO A=
GUADO MARTIN<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;<a href=3D"mailto:alejandro.agu=
adomartin.ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin.ext@=
telefonica.com</a> <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:alejandro.aguadomar=
tin.ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin.ext@telefo=
nica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejan=
dro.aguadomartin.ext@telefonica.com" target=3D"_blank">alejandro.aguadomart=
in.ext@telefonica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_bla=
nk">alejandro.aguadomartin.ext@telefonica.com</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejan=
dro.aguadomartin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomar=
tin..ext@telefonica.com</a>&gt;&gt;&gt;; Shwetha<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Bhandari (s=
hwethab) &lt;<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shweth=
ab@cisco.com</a> <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:shwethab@cisco.com"=
 target=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:shweth=
ab@cisco.com" target=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com<=
/a> &lt;mailto:<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwe=
thab@cisco.com</a>&gt;&gt;&gt;;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Tal Mizrahi &lt;<a href=3D"mailto:t=
al.mizrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a> <=
br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:tal.mizrahi.phd@gma=
il.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mi=
zrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br=
>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:tal.mizrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.=
phd@gmail.com</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mi=
zrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;&gt=
;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Cc:* <a hr=
ef=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a=
 href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt; &lt;ma=
ilto:<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt;=
<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:sfc@ie=
tf.org" target=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a href=3D"mailto:sfc=
@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Subject:* =
Re: PoT review/comments____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Hi Shwetha,=
____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Yes, I thin=
k it is a good idea. From your points, the second<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 one is<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0a bit confu=
sing to me... But I do not fully remember how the<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 model<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0was structu=
red, so I need to revise the document.____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Give me a d=
ay or two to explore again the model, and either we<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0exchange fe=
w emails with proposals for the extension, or we can<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0organise a =
quick call during next week to close a final<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 proposal to<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0share with =
other contributors.____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Thanks!____=
<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Best,____<b=
r>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Alejandro__=
__<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0El 12 de se=
ptiembre de 2019 a las 8:52:44, Shwetha Bhandari<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0(shwethab) =
(<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com=
</a> &lt;mailto:<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shw=
ethab@cisco.com</a>&gt; <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:shwethab@cisco.com"=
 target=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:shweth=
ab@cisco.com" target=3D"_blank">shwethab@cisco.com</a> &lt;mailto:<a href=
=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com</a>&gt;=
&gt;)<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0escribi=C3=
=B3:____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Hi Alejandr=
o, Diego,____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Since you a=
dded extension to do OPoT, should we extend the<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 model in<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0draft-ietf-=
sfc-proof-of-transit to enable OPoT and any<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 parameters<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0required fo=
r it=C2=A0 shared masks per link. If yes my proposal<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 will be<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0to:____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0 1. Augment=
 existing pot-profile with fields to Enable OPoT<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 and a<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0cipher scheme if needed.____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0 2. Separat=
e container in the model to define a map of (Node<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0link/interface, mask) to distribute pair wise masks. For<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 e.g.<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0Node link/interface identifier can be UUID as defined in<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 rfc8348<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0Or____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0 3. Masks c=
an be part of pot-profile.____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0What do you=
 think about revising the model with this?____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Thanks,____=
<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Shwetha____=
<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*From: *&qu=
ot;Frank Brockners (fbrockne)&quot; &lt;<a href=3D"mailto:fbrockne@cisco.co=
m" target=3D"_blank">fbrockne@cisco.com</a> <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:fbrockne@cisco.com"=
 target=3D"_blank">fbrockne@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:fbrock=
ne@cisco.com" target=3D"_blank">fbrockne@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:fbrockne@cisco.com" target=3D"_blank">fbrockne@cisco.com<=
/a> &lt;mailto:<a href=3D"mailto:fbrockne@cisco.com" target=3D"_blank">fbro=
ckne@cisco.com</a>&gt;&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Date: *Wed=
nesday, September 11, 2019 at 2:34 PM<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*To: *ALEJA=
NDRO AGUADO MARTIN<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=
=3D"mailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_blank">ale=
jandro.aguadomartin.ext@telefonica.com</a> <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:alejandro.aguadomar=
tin.ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin.ext@telefo=
nica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejan=
dro.aguadomartin.ext@telefonica.com" target=3D"_blank">alejandro.aguadomart=
in.ext@telefonica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_bla=
nk">alejandro.aguadomartin.ext@telefonica.com</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejan=
dro.aguadomartin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomar=
tin..ext@telefonica.com</a>&gt;&gt;&gt;, &quot;Diego R.<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Lopez&quot;=
 &lt;<a href=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_blank">dieg=
o.r.lopez@telefonica.com</a> <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:diego.r.lopez@telef=
onica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.=
r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&=
gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:diego.r..lopez@telefonica.com" target=3D"_blank">diego.r.=
.lopez@telefonica.com</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.=
r..lopez@telefonica.com" target=3D"_blank">diego.r..lopez@telefonica.com</a=
>&gt;&gt;&gt;, Carlos Pignataro<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;cpignat=
a@cisco..com &lt;mailto:<a href=3D"mailto:cpignata@cisco.com" target=3D"_bl=
ank">cpignata@cisco.com</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:cpigna=
ta@cisco.com" target=3D"_blank">cpignata@cisco.com</a>&gt;&gt;&gt;, Shwetha=
 bhandari<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=
=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com</a> &lt=
;mailto:<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@ci=
sco.com</a>&gt; <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:shwethab@cisco.com"=
 target=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:shweth=
ab@cisco.com" target=3D"_blank">shwethab@cisco.com</a> &lt;mailto:<a href=
=3D"mailto:shwethab@cisco." target=3D"_blank">shwethab@cisco.</a>.com&gt;&g=
t;&gt;, Tal <br>
&gt; &gt; &gt;&gt;&gt;&gt; Mizrahi<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=
=3D"mailto:tal.mizrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gma=
il.com</a> &lt;mailto:<a href=3D"mailto:tal.mizrahi.phd@gmail.com" target=
=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mi=
zrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br=
>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mi=
zrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a> <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:tal.mizrahi.phd@gma=
il.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Cc: *&quot=
;<a href=3D"mailto:a..aguadom@fi.upm.es" target=3D"_blank">a..aguadom@fi.up=
m.es</a> &lt;mailto:<a href=3D"mailto:a..aguadom@fi.upm.es" target=3D"_blan=
k">a..aguadom@fi.upm.es</a>&gt; <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:a..aguadom@fi.upm.e=
s" target=3D"_blank">a..aguadom@fi.upm.es</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:a.agua=
dom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a> &lt;mailto:<a href=
=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a>&g=
t;&gt;&quot;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=
=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a> &=
lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguado=
m@fi.upm.es</a>&gt; <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es=
" target=3D"_blank">a.aguadom@fi.upm.es</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:a.agua=
dom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a> &lt;mailto:<a href=
=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a>&g=
t;&gt;&gt;,<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &quot;<a href=3D"mailto:sfc@ietf.or=
g" target=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a href=3D"mailto:sfc@ietf=
.org" target=3D"_blank">sfc@ietf.org</a>&gt; &lt;mailto:<a href=3D"mailto:s=
fc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a> &lt;mail=
to:<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt;&g=
t;&quot; &lt;<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org=
</a> <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:sfc@ietf.org" targe=
t=3D"_blank">sfc@ietf.org</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:sfc@ie=
tf.org" target=3D"_blank">sfc@ietf.org</a>&gt; &lt;mailto:<a href=3D"mailto=
:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a href=3D"mai=
lto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt;&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Subject: *=
RE: PoT review/comments____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Hi Alejandr=
o,____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Thanks agai=
n for the review. Your comments have been<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 integrated into<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0draft-ietf-=
sfc-proof-of-transit-03 which just got posted.____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Cheers, Fra=
nk____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*From:*Fran=
k Brockners (fbrockne)<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Sent:* Mon=
tag, 27. Mai 2019 18:18<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*To:* ALEJA=
NDRO AGUADO MARTIN<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=
=3D"mailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_blank">ale=
jandro.aguadomartin.ext@telefonica.com</a> <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:alejandro.aguadomar=
tin.ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin.ext@telefo=
nica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejan=
dro.aguadomartin.ext@telefonica.com" target=3D"_blank">alejandro.aguadomart=
in.ext@telefonica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_bla=
nk">alejandro.aguadomartin.ext@telefonica.com</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejan=
dro.aguadomartin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomar=
tin..ext@telefonica.com</a>&gt;&gt;&gt;; Diego R. Lopez<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=
=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@te=
lefonica.com</a> <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:diego.r.lopez@telef=
onica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.=
r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&=
gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_blank">diego.r.l=
opez@telefonica.com</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.=
r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&=
gt;&gt;&gt;; Carlos Pignataro (cpignata)<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=
=3D"mailto:cpignata@cisco.com" target=3D"_blank">cpignata@cisco.com</a> &lt=
;mailto:<a href=3D"mailto:cpignata@cisco.com" target=3D"_blank">cpignata@ci=
sco.com</a>&gt; <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:cpignata@cisco.com"=
 target=3D"_blank">cpignata@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:cpigna=
ta@cisco.com" target=3D"_blank">cpignata@cisco.com</a> &lt;mailto:<a href=
=3D"mailto:cpignata@cisco." target=3D"_blank">cpignata@cisco.</a>.com&gt;&g=
t;&gt;; Shwetha<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Bhandari<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0(shwethab) =
&lt;<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.=
com</a> &lt;mailto:<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">=
shwethab@cisco.com</a>&gt; <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:shwethab@cisco.com"=
 target=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:shweth=
ab@cisco.com" target=3D"_blank">shwethab@cisco.com</a> &lt;mailto:<a href=
=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com</a>&gt;=
&gt;&gt;; Tal<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Mizrahi &lt=
;<a href=3D"mailto:tal.mizrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi=
.phd@gmail.com</a> <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:tal.mizrahi.phd@gma=
il.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mi=
zrahi.phd@gmail." target=3D"_blank">tal.mizrahi.phd@gmail.</a>.com&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mi=
zrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a> <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:tal.mizrahi.phd@gma=
il.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Cc:* <a hr=
ef=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a>=
 &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.agua=
dom@fi.upm.es</a>&gt; <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es=
" target=3D"_blank">a.aguadom@fi.upm.es</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:a.agua=
dom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a> &lt;mailto:<a href=
=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a>&g=
t;&gt;;<br>
&gt; &gt; &gt;&gt;&gt;&gt; <a href=3D"mailto:sfc@ietf.org" target=3D"_blank=
">sfc@ietf.org</a> &lt;mailto:<a href=3D"mailto:sfc@ietf.org" target=3D"_bl=
ank">sfc@ietf.org</a>&gt; &lt;mailto:<a href=3D"mailto:sfc@ietf.org" target=
=3D"_blank">sfc@ietf.org</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a> &lt;mail=
to:<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt;&g=
t;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Subject:* =
RE: PoT review/comments____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Hi Alejandr=
o,____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Many thanks=
 for the comments =E2=80=93 and sorry for the delay =E2=80=93<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0unfortunate=
ly your email somehow got dropped from my todo list.<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Please see =
inline=E2=80=A6____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0(cc=E2=80=
=99ing the list as well).____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*From:*ALEJ=
ANDRO AGUADO MARTIN<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=
=3D"mailto:alejandro.aguadomartin..ext@telefonica.com" target=3D"_blank">al=
ejandro.aguadomartin..ext@telefonica.com</a> <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:alejandro.aguadomar=
tin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin..ext@tele=
fonica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejan=
dro.aguadomartin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomar=
tin..ext@telefonica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_bla=
nk">alejandro.aguadomartin.ext@telefonica.com</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejan=
dro.aguadomartin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomar=
tin..ext@telefonica.com</a>&gt;&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Sent:* Mon=
tag, 15. April 2019 17:27<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*To:* Diego=
 R. Lopez &lt;<a href=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_bl=
ank">diego.r.lopez@telefonica.com</a> <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:diego.r.lopez@telef=
onica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.=
r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&=
gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_blank">diego.r.l=
opez@telefonica.com</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.=
r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&=
gt;&gt;&gt;; Carlos Pignataro (cpignata)<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=
=3D"mailto:cpignata@cisco.com" target=3D"_blank">cpignata@cisco.com</a> &lt=
;mailto:<a href=3D"mailto:cpignata@cisco.com" target=3D"_blank">cpignata@ci=
sco.com</a>&gt; <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:cpignata@cisco.com"=
 target=3D"_blank">cpignata@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:cpigna=
ta@cisco.com" target=3D"_blank">cpignata@cisco.com</a> &lt;mailto:<a href=
=3D"mailto:cpignata@cisco." target=3D"_blank">cpignata@cisco.</a>.com&gt;&g=
t;&gt;; Frank<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Brockners<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0(fbrockne) =
&lt;<a href=3D"mailto:fbrockne@cisco.com" target=3D"_blank">fbrockne@cisco.=
com</a> &lt;mailto:<a href=3D"mailto:fbrockne@cisco.com" target=3D"_blank">=
fbrockne@cisco.com</a>&gt; <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:fbrockne@cisco.com"=
 target=3D"_blank">fbrockne@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:fbrock=
ne@cisco.com" target=3D"_blank">fbrockne@cisco.com</a> &lt;mailto:<a href=
=3D"mailto:fbrockne@cisco.com" target=3D"_blank">fbrockne@cisco.com</a>&gt;=
&gt;&gt;; Shwetha<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Bhandari (s=
hwethab) &lt;<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shweth=
ab@cisco.com</a> <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:shwethab@cisco.com"=
 target=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:shweth=
ab@cisco.com" target=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com<=
/a> &lt;mailto:<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwe=
thab@cisco.com</a>&gt;&gt;&gt;;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Tal Mizrahi &lt;<a href=3D"mailto:t=
al.mizrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a> <=
br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:tal.mizrahi.phd@gma=
il.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mi=
zrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br=
>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:tal.mizrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.=
phd@gmail.com</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mi=
zrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;&gt=
;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Cc:* <a hr=
ef=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a>=
 &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.agua=
dom@fi.upm.es</a>&gt; <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es=
" target=3D"_blank">a.aguadom@fi.upm.es</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:a.agua=
dom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a> &lt;mailto:<a href=
=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a>&g=
t;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Subject:* =
PoT review/comments____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Dear all,__=
__<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0I gave a qu=
ick review to the PoT document. Some comments:____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0- I read =
=E2=80=9CThe non-constant coefficients are used to <br>
&gt; &gt; &gt;&gt;&gt;&gt; generate the<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Lagrange Po=
lynomial Constants (LPC).=E2=80=9D As far as I<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 understood, the<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0points assi=
gned to each node (Xi) are the ones used for<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 generating<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0the LPCi, a=
ren=E2=80=99t they?____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/=E2=80=A6=
FB: Good catch. The LPCs are of course computed using (x_i,<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0y_i)./*____=
<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0- If we go =
for including the YANG in the current document<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 (which I<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0agree), par=
ameters should be described before the yang<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 definition,<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0and maybe i=
t would be helpful to have the yang tree (see the<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 current<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0version att=
ached).____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/=E2=80=A6=
FB: Thanks. IMHO it makes sense to keep the YANG model <br>
&gt; &gt; &gt;&gt;&gt;&gt; in the<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0current doc=
, given that the model and the description go <br>
&gt; &gt; &gt;&gt;&gt;&gt; hand in<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0hand. We ca=
n of course also include the yang tree to make<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 reading<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0easier. Thi=
s is consistent with other documents which<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 specify YANG<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0models./*__=
__<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0- I include=
 in the attached file few questions about naming<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 of some<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0parameters.=
____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*//*____<br=
>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/=E2=80=A6=
FB:<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0- naming F_=
i(x_i, y_i) =E2=80=93 I agree that a better name could be<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 used.<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0The only po=
tential concern would be that the open source<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0implementat=
ion in OpenDaylight uses this naming =E2=80=93 changing<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 it might<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0lead to con=
fusion.. We can start with adding a comment to make<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0things clea=
rer./*____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*//*____<br=
>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/- secret =
key =E2=80=93 this is the constant part of the first<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 polynomial<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0which serve=
s as the secret =E2=80=93 and which is re-retrieved.<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Again, we<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0can update =
the description to make things clearer./*____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*//*____<br=
>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/- size of=
 the random number: This is unrelated to OPOT.<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 The random<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0number is t=
o uniquely identify a packet. There is a trade-off<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0between the=
 size of the random number and how often you need to<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0re-key your=
 system. At high speeds, the random number =E2=80=93 which<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0identifies =
a particular packet =E2=80=93 is used up quite quickly if<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 it is<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0only 32-bit=
 wide. See section 4<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; <br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 /*<a href=3D"https://=
tools.ietf.org/html/draft-ietf-sfc-proof-of-transit-02#section-4____" rel=
=3D"noreferrer" target=3D"_blank">https://tools.ietf.org/html/draft-ietf-sf=
c-proof-of-transit-02#section-4____</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*//*____<br=
>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/- number =
of profiles: For a deployment which is expected<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 to renew<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0keys every =
now and then (e.g. you run with 32-bit random<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 numbers at<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0reasonably =
high speeds), you need at least 2 profiles =E2=80=93 an<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 active<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0one and one=
 that you can activate once you run out of random<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 numbers<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0(which is w=
hat the encapsulating node would decide).. /*____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0- I have ch=
ecked some of the existing YANG files within the<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 IETF to<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0see in whic=
h it would be helpful to include. From the (not<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 so) old<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0OpenFlow, I=
 assume that one match is necessary (for <br>
&gt; &gt; &gt;&gt;&gt;&gt; identify the<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0iOAM/PoT he=
ader) whilst the source node can use any existing<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 match<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0field to id=
entify packets where to apply the PoT scheme. In<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 terms of<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0actions, I =
would say that two may be required: for any node, an<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0update-pot =
is necessary, while the verifier would need a<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 verify-pot<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0type of act=
ion, that would ideally either remove the header<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 or drop<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0the packet =
if fails (I do not know if you are thinking in more<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0complex sce=
narios).____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*//*____<br=
>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/=E2=80=A6=
FB: From an OF perspective, that sounds feasible.. That<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 said, we<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0probably wa=
nt to avoid making the spec specific to a<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 technology like<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0OF, hence w=
ould suggest that we don=E2=80=99t specify such a <br>
&gt; &gt; &gt;&gt;&gt;&gt; behavior as<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0part of thi=
s document./*____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*//*____<br=
>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0- For this =
last point, I have seen the definitions within<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0draft-asech=
oud-rtgwg-qos-model-08, where matched could map<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 (if I am<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0not wrong) =
to classifiers/filters, and actions to actions. I<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 send<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0you the mod=
els in a zip file. In this sense the model to be<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 defined<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0in the PoT =
shall be an augment of the models defined in that<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0document. I=
 have not done a very deep revision on the model,<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 but I<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0think it co=
uld fit there. If you have check this or other<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 models,<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0let me know=
 so I could also help.____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*//*____<br=
>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/=E2=80=A6=
FB: Per my note above: In order to keep POT generic and<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 not link<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0it to a par=
ticular classification mechanism, I=E2=80=99d prefer to<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 keep the<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0classificat=
ion question as out of scope for the current<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 document.<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0That way it=
 can also apply to technologies which come with<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 their own<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0way to clas=
sify =E2=80=93 and which might fully decouple the tunneling<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0aspects fro=
m the classification aspects. /*____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Thanks a lo=
t and sorry for such long email.____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/..FB: Tha=
nks again for all your comments. We=E2=80=99ll get them<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 included<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0in the next=
 revision. /*____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*//*____<br=
>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/Cheers, F=
rank/*____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Best,____<b=
r>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Alejandro__=
__<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; <br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 ---------------------=
---------------------------------------------------<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Este mensaj=
e y sus adjuntos se dirigen exclusivamente a su<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0destinatari=
o, puede contener informaci=C3=B3n privilegiada o<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 confidencial<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0y es para u=
so exclusivo de la persona o entidad de destino.<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Si no es<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0usted. el d=
estinatario indicado, queda notificado de que la<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 lectura,<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0utilizaci=
=C3=B3n, divulgaci=C3=B3n y/o copia sin autorizaci=C3=B3n puede estar<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0prohibida e=
n virtud de la legislaci=C3=B3n vigente. Si ha<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 recibido este<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0mensaje por=
 error, le rogamos que nos lo comunique<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 inmediatamente<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0por esta mi=
sma v=C3=ADa y proceda a su destrucci=C3=B3n.<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0The informa=
tion contained in this transmission is <br>
&gt; &gt; &gt;&gt;&gt;&gt; privileged and<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0confidentia=
l information intended only for the use of the<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 individual<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0or entity n=
amed above. If the reader of this message is not the<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0intended re=
cipient, you are hereby notified that any<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 dissemination,<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0distributio=
n or copying of this communication is strictly<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0prohibited.=
 If you have received this transmission in error,<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 do not<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0read it. Pl=
ease immediately reply to the sender that you have<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0received th=
is communication in error and then delete it.<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Esta mensag=
em e seus anexos se dirigem exclusivamente ao seu<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0destinat=C3=
=A1rio, pode conter informa=C3=A7=C3=A3o privilegiada ou<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 confidencial e<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0=C3=A9 para=
 uso exclusivo da pessoa ou entidade de destino. Se n=C3=A3o =C3=A9<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0vossa senho=
ria o destinat=C3=A1rio indicado, fica notificado de <br>
&gt; &gt; &gt;&gt;&gt;&gt; que a<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0leitura, ut=
iliza=C3=A7=C3=A3o, divulga=C3=A7=C3=A3o e/ou c=C3=B3pia sem autoriza=C3=A7=
=C3=A3o pode<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0estar proib=
ida em virtude da legisla=C3=A7=C3=A3o vigente. Se recebeu <br>
&gt; &gt; &gt;&gt;&gt;&gt; esta<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0mensagem po=
r erro, rogamos-lhe que nos o comunique<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 imediatamente por<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0esta mesma =
via e proceda a sua destrui=C3=A7=C3=A3o____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0___________=
____________________________________<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0sfc mailing=
 list<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; <a href=3D"mailto:sfc@ietf.org=
" target=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a href=3D"mailto:sfc@ietf.=
org" target=3D"_blank">sfc@ietf.org</a>&gt; &lt;mailto:<a href=3D"mailto:sf=
c@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt; <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:sfc@ietf.org" targe=
t=3D"_blank">sfc@ietf.org</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:sfc@ie=
tf.org" target=3D"_blank">sfc@ietf.org</a>&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; <a href=3D"https://www.ietf.or=
g/mailman/listinfo/sfc" rel=3D"noreferrer" target=3D"_blank">https://www.ie=
tf.org/mailman/listinfo/sfc</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; ______________________________=
_________________<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; sfc mailing list<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; <a href=3D"mailto:sfc@ietf.org=
" target=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a href=3D"mailto:sfc@ietf.=
org" target=3D"_blank">sfc@ietf.org</a>&gt; &lt;mailto:<a href=3D"mailto:sf=
c@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; <a href=3D"https://www.ietf.or=
g/mailman/listinfo/sfc" rel=3D"noreferrer" target=3D"_blank">https://www.ie=
tf.org/mailman/listinfo/sfc</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt; _______________________________________________<=
br>
&gt; &gt; &gt;&gt;&gt;&gt; sfc mailing list<br>
&gt; &gt; &gt;&gt;&gt;&gt; <a href=3D"mailto:sfc@ietf.org" target=3D"_blank=
">sfc@ietf.org</a> &lt;mailto:<a href=3D"mailto:sfc@ietf.org" target=3D"_bl=
ank">sfc@ietf.org</a>&gt; &lt;mailto:<a href=3D"mailto:sfc@ietf.org" target=
=3D"_blank">sfc@ietf.org</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt; <a href=3D"https://www.ietf.org/mailman/listinfo=
/sfc" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/mailman/lis=
tinfo/sfc</a><br>
&gt; &gt; &gt; <br>
&gt; &gt; <br>
&gt; &gt; _______________________________________________<br>
&gt; &gt; sfc mailing list<br>
&gt; &gt; <a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a=
><br>
&gt; &gt; <a href=3D"https://www.ietf.org/mailman/listinfo/sfc" rel=3D"nore=
ferrer" target=3D"_blank">https://www.ietf.org/mailman/listinfo/sfc</a><br>
&gt; <br>
<br>
</blockquote></div>

--000000000000f2d66d05a2430c37--


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From: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
To: Greg Mirsky <gregimirsky@gmail.com>
CC: "Joel M. Halpern" <jmh@joelhalpern.com>, "sfc@ietf.org" <sfc@ietf.org>
Thread-Topic: [sfc] draft-ietf-sfc-proof-of-transit-04 ready for WGLC? (was RE: PoT review/comments)
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References: <AD9BC8A1-C042-4FA0-8B56-D587D9278E28@cisco.com,> <AC9E0774-9E17-4332-A1E1-BB2B3FA47B7A@cisco.com> <202003301529220283544@zte.com.cn> <787AE7BB302AE849A7480A190F8B93303148958D@OPEXCAUBMA2.corporate.adroot.infra.ftgroup> <EF5269C9-7A7A-477B-A9DF-80D31065C1A6@cisco.com> <787AE7BB302AE849A7480A190F8B933031489A34@OPEXCAUBMA2.corporate.adroot.infra.ftgroup> <FB8FF9D5-5D4D-4F41-82F2-1DB4A5975B78@cisco.com>
In-Reply-To: <FB8FF9D5-5D4D-4F41-82F2-1DB4A5975B78@cisco.com>
From: Greg Mirsky <gregimirsky@gmail.com>
Date: Wed, 1 Apr 2020 16:54:43 -0700
Message-ID: <CA+RyBmUU0KkZ7w=vu1DpnVyY69yUbj4wQjzdapBjVJZrhLiVpw@mail.gmail.com>
To: "Carlos Pignataro (cpignata)" <cpignata=40cisco.com@dmarc.ietf.org>
Cc: Med Boucadair <mohamed.boucadair@orange.com>,  "wei.yuehua@zte.com.cn" <wei.yuehua@zte.com.cn>,  "draft-ietf-sfc-nsh-tlv@ietf.org" <draft-ietf-sfc-nsh-tlv@ietf.org>, "sfc@ietf.org" <sfc@ietf.org>
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Subject: Re: [sfc] I-D Action: draft-ietf-sfc-nsh-tlv-02.txt
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Hi Carlos and Med,
thank you for the discussion. Please find my notes in-lined below under
GIM>> tag.

Regards,
Greg

On Tue, Mar 31, 2020 at 7:22 AM Carlos Pignataro (cpignata) <cpignata=3D
40cisco.com@dmarc.ietf.org> wrote:

> Hi, Med,
>
> It is somewhat hard for me to follow the inlined comments. If there=E2=80=
=99s
> something I miss, please let me know. I=E2=80=99ll preface with =E2=80=9C=
[CMP]"
>
> 2020/03/31 =E5=8D=88=E5=89=8D10:07=E3=80=81mohamed.boucadair@orange.com=
=E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:
>
> Hi Carlos,
>
> Please see inline.
>
> Cheers,
> Med
>
> *De :* Carlos Pignataro (cpignata) [mailto:cpignata@cisco.com
> <cpignata@cisco.com>]
> *Envoy=C3=A9 :* mardi 31 mars 2020 15:23
> *=C3=80 :* BOUCADAIR Mohamed TGI/OLN
> *Cc :* wei.yuehua@zte.com.cn; draft-ietf-sfc-nsh-tlv@ietf.org;
> sfc@ietf.org
> *Objet :* Re: [sfc] I-D Action: draft-ietf-sfc-nsh-tlv-02.txt
>
> Hi, Med,
>
> Really good comments!
>
> In general, I tend to agree with your second comment, which is a
> meta-comment, about adding more descriptive text. That said, I=E2=80=99d =
cautious
> that this document defines foundational data fields and not the usage and
> use cases of them.
> *[Med] Without being verbose, we need to explain why a TLV is useful/how
> it can be used. For example, a reader may ask: how the flow TLV is
> populated? Why it is needed if we can access to the inner packet? should
> the flow TLV by updated on-path? What if there are address rewriting SFs?=
*
>
>
>
> [CMP] I believe this document should answer the questions on syntax and
> definition/meaning, but not the use-case. Saying =E2=80=9CFlow id is for =
marking
> packets of the same flow, and it is a 32-bit number=E2=80=9D is as far as=
 I think
> this should go.
>
> [CMP] What do others think?
>
GIM>> I agree with Med, the document should give at least one example of
how a TLV can be used. At the same time, future documents may define
another scenarios.

>
> *I may have answers to some of those questions but my point is that we
> need to have some of the details in the document (especially, when this i=
s
> important for interoperability).  *
>
>
> Interoperability has many layers. Syntax and semantics need to be ensured
> in this doc.
>
GIM>> I think that the document should define actionable aspect of a TLV.
Just providing format seems insufficient.

>
>
> Based on that, see below.
>
>
> 2020/03/31 =E5=8D=88=E5=89=8D4:16=E3=80=81mohamed.boucadair@orange.com=E3=
=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:
>
> Hi all,
>
> Some easy to fix comments:
>
> =C2=B7         You may consider adding more description to the actual usa=
ge of
> each TLVs.
>
> This document defines information elements rather than use cases for them=
.
> As such, I hesitate in adding too much usage which can be containing. Tha=
t
> said, do you have specific thoughts on usage?
> *[Med] I do have for some (content type, for example), but not sure about
> the others. For example, who sets the tenant-ID? Is it by control or
> extracted from the packets? Idem for the policy-ID.  *
>
>
> [CMP] To me specific usages are outside scope. Many specifications in the
> IETF describe the fields while future companion documents define usage.
> This, to me, is one of those.
>
GIM>> Yes, and there are examples when forward-looking definitions where
taken from the document and moved into the document that explains how that
object is used.

>
>
> =C2=B7         The TLVs content should also be clarified. For example, =
=E2=80=9CAkin,
> but not identical to the usage described in [RFC6437]=E2=80=9D does not s=
ay what is
> the diff vs. 6437 nor why not reusing FL would be sufficient if an IPv6
> transport is used.
>
> Agreed. I would replace:
>
>    Flow ID provides a representation of the flow.  Akin, but not
>    identical to the usage described in [RFC6437].
>
>
> With at least
>    The Flow ID provides a field in the NSH MD Type 2 to label
>    packets belonging to the same flow.  Absence of this field, or
>    a value of zero denotes that packets have not been labeled.
>
>
> *[Med] That=E2=80=99s a good start. Thanks. The natural questions then ar=
e: what
> is a label? What to do with a labeled a packet? do we allow to change the
> label when progressing in an SFP? We need to think about this further. *
>
>
> [CMP] I did not mean to add a =E2=80=9Clabel=E2=80=9D as a noun, but rath=
er label as in
> mark or tag.
>
> [CMP] Immutability is a great question! I tent to think that it could
> change, but what do you think?
>
>
> =C2=B7         Clarify whether conveying multiple instances of each TLV i=
s
> allowed.
>
> That is not for this document to say.
> *[Med] RFC8300 says the following:*
>
>    If multiple instances of the same metadata are included in an NSH
>    packet, but the definition of that Context Header does not allow for
>                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>    it, the SFC-aware SF MUST process the first instance and ignore
>    ^^
>    subsequent instances.  The SFC-aware SF MAY log or increase a counter
>    for this event.
>
> Some use cases can restrict to one interface for example, others to
> multiple.
>
>
> [CMP] Fair enough. We could add requirements on multiplicity.
>
GIM>> I agree that the question of multiple occurence of a TLV should be
specified for each TLV (or we can have a blanket statement with exceptions
though that might add to some confusion).

>
>
>
> =C2=B7         What is a =E2=80=9Ca network-centric forwarding context=E2=
=80=9D?
>
> Here=E2=80=99s my take on text proposal on various fields (this is full t=
ext, not
> diff):
> *[Med] Thank you for drafting this. I hope I can provide text as well.*
>
>
> [CMP] Of course! That=E2=80=99s a back-of-napkin start only.
>
>
> 4.1.  Forwarding Context
>
>    The forwarding context used for segregation and forwarding scope can
>    Take several forms depending on the network environment. For example,
>    VXLAN/VXLAN-GPE VNID, VRF identification, and VLAN. This context
>    header carries this network-based forwarding context.
>
> 4.2.  Tenant Identifier
>
>    Tenant identification is often used for segregation within a multi-
>    tenant environment.  Orchestration system-generated tenant IDs are an
>    example of such data. This context header carries both the format and
>    value of the Tenant identifier.
>
>
> 4.3.  Content Type
> // I believe this needs further thinking on the namespace fo Content
> Types, could even be draft-penno-sfc-appid-05
>
> 4.4.  Ingress Network Information
>
>    This data identifies the ingress network node, and, if required,
>    ingress interface.
>
> // this should be split into Node and Ingress Interface.
>
> 4.4. Ingress Network Node Information
>
>
>    This context header identifies the ingress network node.
>
>
> 4.5. Ingress Network Interface Information
>
>
>    This context header identifies the ingress network interface.
>
>
>
> 4.6.  Flow ID
>    The Flow ID provides a field in the NSH MD Type 2 to label
>    packets belonging to the same flow.  Absence of this field, or
>    a value of zero denotes that packets have not been labeled.
>
>
> ...
>
>
> =C2=B7         Section 7: Please delete =E2=80=9CIANA is requested to cre=
ate a new
> "Network Service Header (NSH) TLV=E2=80=9D as we do already have a regist=
ry at:
> https://www.iana.org/assignments/nsh/nsh.xhtml#optional-variable-length-m=
etadata-types.
> You may use this NEW wording:
>
>    This document requests IANA to assign the following types from the
>    "NSH IETF- Assigned Optional Variable-Length Metadata Types" (0x0000
>    IETF Base NSH MD Class) registry available at:
>    https://www.iana.org/assignments/nsh/nsh.xhtml#optional-variable-
> <https://www.iana.org/assignments/nsh/nsh.xhtml#optional-variable-length-=
metadata-types>
>    length-metadata-types
> <https://www.iana.org/assignments/nsh/nsh.xhtml#optional-variable-length-=
metadata-types>
> .
>
> Indeed!!!
>
> And additionally should move the Types to TBAs.
>
> Thanks,
>
> Carlos.
>
>
>
> Thank you.
>
>
>
> [CMP] You are welcome!
>
> Carlos.
>
> Cheers,
> Med
>
> *De :* sfc [mailto:sfc-bounces@ietf.org <sfc-bounces@ietf.org>] *De la
> part de* wei.yuehua@zte.com.cn
> *Envoy=C3=A9 :* lundi 30 mars 2020 09:29
> *=C3=80 :* cpignata@cisco.com; sfc@ietf.org
> *Cc :* draft-ietf-sfc-nsh-tlv@ietf.org; sfc@ietf.org
> *Objet :* Re: [sfc] I-D Action: draft-ietf-sfc-nsh-tlv-02.txt
>
> Dear Carlos,
> Thank you for reminding this kind of modifications to the mailing list so
> that more people could notice and give comments.
> https://tools.ietf.org/rfcdiff?url2=3Ddraft-ietf-sfc-nsh-tlv-02.txt
> Your suggestion is reasonable.
>
> Does anyone aware of implementations?
> or How do you think of TBAs?
>
> I appreciate your comments.
>
> *Best Regards,*
> *=E9=AD=8F=E6=9C=88=E5=8D=8E Corona Wei*
> M: +86 13851460269 E: wei.yuehua@zte.com.cn
>
> =E5=8E=9F=E5=A7=8B=E9=82=AE=E4=BB=B6
> *=E5=8F=91=E4=BB=B6=E4=BA=BA=EF=BC=9A*CarlosPignataro(cpignata) <cpignata=
@cisco.com>
> *=E6=94=B6=E4=BB=B6=E4=BA=BA=EF=BC=9A*=E9=AD=8F=E6=9C=88=E5=8D=8E00019655=
;
> *=E6=8A=84=E9=80=81=E4=BA=BA=EF=BC=9A*sfc@ietf.org <sfc@ietf.org>;draft-i=
etf-sfc-nsh-tlv@ietf.org <
> draft-ietf-sfc-nsh-tlv@ietf.org>;
> *=E6=97=A5* *=E6=9C=9F* *=EF=BC=9A*2020=E5=B9=B403=E6=9C=8828=E6=97=A5 21=
:49
> *=E4=B8=BB* *=E9=A2=98* *=EF=BC=9A**Re: [sfc] I-D Action: draft-ietf-sfc-=
nsh-tlv-02.txt*
> Dear Wei,
> Thanks for the quick responses and accepting the suggestions.
>
> Only one follow-up on this, which I bring to the top:
>
> Wei>> Only editorial improvement.
> The Types in previous version were:
> 0x1,    0x4,    0x6,   0x7,  0x8,     0x9=EF=BC=8C  0xA=EF=BC=8C  0xB
> The Types in current version are:
> 0x01,  0x02,  0x03, 0x04,0x05=EF=BC=8C0x06=EF=BC=8C0x07=EF=BC=8C0x08
>
>
> I do not believe that changing a protocol value is an editorial change (o=
r
> editorial improvement) necessarily.
>
> Are there implementations following the previous allocations? Unused
> values in between might look weird but it is to necessarily unoptimized,
> unimproved, or wrong.
>
> If a goal is to have a gapless increasing list and there are no
> implementations, then TBAs can be used and assignment at the end (e.g., i=
f
> we split the node/interface into two).
>
> On the other hand, I=E2=80=99d always prioritize implementations (the ent=
ropy of
> reality will take care of disorganize the list :-)
>
> I=E2=80=99d leave them as they were, since there are enough numbers in th=
e space,
> or ask on the list for changing and wait.
>
> Thanks,
>
> Carlos.
>
>
>
> 2020/03/27 =E5=8D=88=E5=BE=8C11:13=E3=80=81wei.yuehua@zte.com.cn=E3=81=AE=
=E3=83=A1=E3=83=BC=E3=83=AB:
>
> Dear Carlos,
> I appreciated your comments.
> Please see my response in line with Wei>> tag
> *Best Regards,*
> *=E9=AD=8F=E6=9C=88=E5=8D=8E Corona Wei*
> M: +86 13851460269 E: wei.yuehua@zte.com.cn
>
>
>
> *=E5=8F=91=E4=BB=B6=E4=BA=BA=EF=BC=9A*CarlosPignataro(cpignata) <cpignata=
=3D40cisco.com@dmarc.ietf.org>
> *=E6=94=B6=E4=BB=B6=E4=BA=BA=EF=BC=9A*sfc@ietf.org <sfc@ietf.org>;
> *=E6=8A=84=E9=80=81=E4=BA=BA=EF=BC=9A*draft-ietf-sfc-nsh-tlv@ietf.org <dr=
aft-ietf-sfc-nsh-tlv@ietf.org>;
> *=E6=97=A5* *=E6=9C=9F* *=EF=BC=9A*2020=E5=B9=B403=E6=9C=8827=E6=97=A5 02=
:36
> *=E4=B8=BB* *=E9=A2=98* *=EF=BC=9A**Re: [sfc] I-D Action: draft-ietf-sfc-=
nsh-tlv-02.txt*
>
> _______________________________________________
> sfc mailing list
> sfc@ietf.org
> https://www.ietf.org/mailman/listinfo/sfc
> Hi, SFC,
>
> Apologies, a late response to
> https://mailarchive.ietf.org/arch/msg/sfc/pNT0kOnFHZeTBLXjuIH0hoKhJs4/
>
> Looking at the document I=E2=80=99ve got a few comments, prefaced with =
=E2=80=9CCMP=E2=80=9D:
>
>
> 2.1.  Terminology
>
>
> CMP: Instead of duplicating definition of terms, why not point to RFC 830=
0
> and RFC 7665 as needed, and only define new terms.
>
> Wei>> Will delete duplicated NSH, MD Type and SFC which have been defined
> in  RFC 8300 and RFC 7665
>
>        0                   1                   2                   3
>
>        0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
>
>       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>
>       |Ver|O|C|R|R|R|R|R|R|   Length  |    MD Type    | Next Protocol |
>
>       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>
>
>
>                          Figure 1: NSH Base Header
>
> CMP: This is an old version, missing TTLL from RFC 88300
> Wei>> Will modify this figure to align with RFC8300
>
>
>    where
>
>
>
>       Metadata Class (MD Class): Defines the scope of the Type field to
>
>       provide a hierarchical namespace.
>
>
>
>       Type - Indicates the explicit type of metadata being carried.  The
>
>       value is one from the Network Service Header (NSH) TLV Type
>
>       registry (Section 7).
>
>
>
>       Unassigned bit: One unassigned bit is available for future use.
>
>       This bit MUST NOT be set, and it MUST be ignored on receipt.
>
>
>
>       Length: Indicates the length of the variable-length metadata, in
>
>       bytes.  In case the metadata length is not an integer number of
>
>       4-byte words, the sender MUST add pad bytes immediately following
>
>       the last metadata byte to extend the metadata to an integer number
>
>       of 4-byte words.  The receiver MUST round the Length field up to
>
>       the nearest 4-byte-word boundary, to locate and process the next
>
>       field in the packet.  The receiver MUST access only those bytes in
>
>       the metadata indicated by the Length field (i.e., actual number of
>
>       bytes) and MUST ignore the remaining bytes up to the nearest 4-
>
>       byte-word boundary.  The length may be 0 or greater.
>
>
>
>       A value of 0 denotes a Context Header without a Variable-Length
>
>       Metadata field.
>
>
> CMP: Instead of copy/paste repeating this from RFC 8300, please add a
> pointer. Copy/past text gets desynchronized easily.
> Wei>> wil delete this part.
>
>
> 4.2.  Tenant Identifier
>
>
>
>    Tenant identification is often used for segregation within a multi-
>
>    tenant environment.  Orchestration system-generated tenant IDs are an
>
>    example of such data.
>
>
>
>        0                   1                   2                   3
>
>        0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
>
>       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>
>       |    Metadata Class =3D 0x0000    |  Type =3D 0x02  |U|  Length=3D1=
2  |
>
>
> CMP: Seems like this Type, as well as others, were changed from the
> previous version. Why?
> Wei>> Only editorial improvement.
> The Types in previous version were:
> 0x1,    0x4,    0x6,   0x7,  0x8,     0x9=EF=BC=8C  0xA=EF=BC=8C  0xB
> The Types in current version are:
> 0x01,  0x02,  0x03, 0x04,0x05=EF=BC=8C0x06=EF=BC=8C0x07=EF=BC=8C0x08
>
>
> 7.  IANA Considerations
>
>
> CMP: This needs registration: Metadata Class =3D 0x0000
>
> CMP: Also, the Context Type (CT) needs registration.
>
> CMP: And these as well:
> * Tenant Type (TT)
> * Group Type (GT)
> * URI Type
> Wei>> Will follow your advice.
>
> Thanks!
>
> Carlos.
>
>
> _______________________________________________
> sfc mailing list
> sfc@ietf.org
> https://www.ietf.org/mailman/listinfo/sfc
>
>
>
> _______________________________________________
> sfc mailing list
> sfc@ietf.org
> https://www.ietf.org/mailman/listinfo/sfc
>

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<div dir=3D"ltr"><div dir=3D"ltr">Hi Carlos and Med,<div>thank you for the =
discussion. Please find my notes in-lined below under GIM&gt;&gt; tag.</div=
><div><br></div><div>Regards,</div><div>Greg</div></div><br><div class=3D"g=
mail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Tue, Mar 31, 2020 at 7=
:22 AM Carlos Pignataro (cpignata) &lt;cpignata=3D<a href=3D"mailto:40cisco=
.com@dmarc.ietf.org">40cisco.com@dmarc.ietf.org</a>&gt; wrote:<br></div><bl=
ockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-lef=
t:1px solid rgb(204,204,204);padding-left:1ex">



<div style=3D"overflow-wrap: break-word;">
Hi, Med,
<div><br>
</div>
<div>It is somewhat hard for me to follow the inlined comments. If there=E2=
=80=99s something I miss, please let me know. I=E2=80=99ll preface with =E2=
=80=9C[CMP]&quot;<br>
<div><br>
<blockquote type=3D"cite">
<div>2020/03/31 =E5=8D=88=E5=89=8D10:07=E3=80=81<a href=3D"mailto:mohamed.b=
oucadair@orange.com" target=3D"_blank">mohamed.boucadair@orange.com</a>=E3=
=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:</div>
<br>
<div>
<div style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-v=
ariant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:star=
t;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;t=
ext-decoration:none">
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:rgb=
(31,73,125)">Hi Carlos,<u></u><u></u></span></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:rgb=
(31,73,125)"><u></u>=C2=A0<u></u></span></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:rgb=
(31,73,125)">Please see inline.<u></u><u></u></span></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:rgb=
(31,73,125)"><u></u>=C2=A0<u></u></span></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:rgb=
(31,73,125)">Cheers,<u></u><u></u></span></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:rgb=
(31,73,125)">Med<u></u><u></u></span></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:rgb=
(31,73,125)"><u></u>=C2=A0<u></u></span></div>
<div style=3D"border-style:none none none solid;border-left-width:1.5pt;bor=
der-left-color:blue;padding:0cm 0cm 0cm 4pt">
<div>
<div style=3D"border-style:solid none none;border-top-width:1pt;border-top-=
color:rgb(181,196,223);padding:3pt 0cm 0cm">
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<b><span lang=3D"FR" style=3D"font-size:10pt;font-family:Tahoma,sans-serif"=
>De=C2=A0:</span></b><span lang=3D"FR" style=3D"font-size:10pt;font-family:=
Tahoma,sans-serif"><span>=C2=A0</span>Carlos Pignataro (cpignata)
 [<a href=3D"mailto:cpignata@cisco.com" style=3D"color:purple;text-decorati=
on:underline" target=3D"_blank">mailto:cpignata@cisco.com</a>]<span>=C2=A0<=
/span><br>
<b>Envoy=C3=A9=C2=A0:</b><span>=C2=A0</span>mardi 31 mars 2020 15:23<br>
<b>=C3=80=C2=A0:</b><span>=C2=A0</span>BOUCADAIR Mohamed TGI/OLN<br>
<b>Cc=C2=A0:</b><span>=C2=A0</span><a href=3D"mailto:wei.yuehua@zte.com.cn"=
 style=3D"color:purple;text-decoration:underline" target=3D"_blank">wei.yue=
hua@zte.com.cn</a>;<span>=C2=A0</span><a href=3D"mailto:draft-ietf-sfc-nsh-=
tlv@ietf.org" style=3D"color:purple;text-decoration:underline" target=3D"_b=
lank">draft-ietf-sfc-nsh-tlv@ietf.org</a>;<span>=C2=A0</span><a href=3D"mai=
lto:sfc@ietf.org" style=3D"color:purple;text-decoration:underline" target=
=3D"_blank">sfc@ietf.org</a><br>
<b>Objet=C2=A0:</b><span>=C2=A0</span>Re: [sfc] I-D Action: draft-ietf-sfc-=
nsh-tlv-02.txt<u></u><u></u></span></div>
</div>
</div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u>=C2=A0<u></u></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
Hi, Med,<span>=C2=A0</span><u></u><u></u></div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u>=C2=A0<u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
Really good comments!=C2=A0<u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u>=C2=A0<u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
In general, I tend to agree with your second comment, which is a meta-comme=
nt, about adding more descriptive text. That said, I=E2=80=99d cautious tha=
t this document defines foundational data fields and not the usage and use =
cases of them.<u></u><u></u></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<b><i><span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;col=
or:rgb(31,73,125)">[Med] Without being verbose, we need to explain why a TL=
V is useful/how it can be used. For example, a reader may ask: how the flow=
 TLV is populated?
 Why it is needed if we can access to the inner packet? should the flow TLV=
 by updated on-path? What if there are address rewriting SFs?<u></u><u></u>=
</span></i></b></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<b><i><span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;col=
or:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></i></b></div>
</div>
</div>
</div>
</div>
</blockquote>
<div><br>
</div>
<div><font color=3D"#000000">[CMP] I believe this document should answer th=
e questions on syntax and definition/meaning, but not the use-case. Saying=
=C2=A0=E2=80=9CFlow id is for marking packets of the same flow, and it is a=
 32-bit number=E2=80=9D is as far as I think this=C2=A0should
 go.=C2=A0</font></div>
<div><font color=3D"#000000"><br>
</font></div>
<div><font color=3D"#000000">[CMP] What do=C2=A0others think?</font></div><=
/div></div></div></blockquote><div>GIM&gt;&gt; I agree with Med, the docume=
nt should give at least one example of how a TLV can be used. At the same t=
ime, future documents may define another scenarios.</div><blockquote class=
=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rg=
b(204,204,204);padding-left:1ex"><div style=3D"overflow-wrap: break-word;">=
<div><div>
<br>
<blockquote type=3D"cite">
<div>
<div style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-v=
ariant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:star=
t;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;t=
ext-decoration:none">
<div style=3D"border-style:none none none solid;border-left-width:1.5pt;bor=
der-left-color:blue;padding:0cm 0cm 0cm 4pt">
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<b><i><span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;col=
or:rgb(31,73,125)">I may have answers to some of those questions but my poi=
nt is that we need to have some of the details in the document (especially,=
 when this
 is important for interoperability). =C2=A0</span></i></b></div>
</div>
</div>
</div>
</div>
</blockquote>
<div><br>
</div>
<div>Interoperability has many layers. Syntax and semantics need to be ensu=
red in this doc.=C2=A0</div></div></div></div></blockquote><div>GIM&gt;&gt;=
 I think that the document should define actionable aspect of a TLV. Just p=
roviding format seems insufficient.</div><blockquote class=3D"gmail_quote" =
style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);pa=
dding-left:1ex"><div style=3D"overflow-wrap: break-word;"><div><div>
<br>
<blockquote type=3D"cite">
<div>
<div style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-v=
ariant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:star=
t;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;t=
ext-decoration:none">
<div style=3D"border-style:none none none solid;border-left-width:1.5pt;bor=
der-left-color:blue;padding:0cm 0cm 0cm 4pt">
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:rgb=
(31,73,125)"><u></u><u></u></span></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u>=C2=A0<u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
Based on that, see below.<u></u><u></u></div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<br>
<br>
<u></u><u></u></div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
2020/03/31<span>=C2=A0</span><span style=3D"font-family:&quot;MS Gothic&quo=
t;">=E5=8D=88=E5=89=8D</span>4:16<span style=3D"font-family:&quot;MS Gothic=
&quot;">=E3=80=81</span><a href=3D"mailto:mohamed.boucadair@orange.com" sty=
le=3D"color:purple;text-decoration:underline" target=3D"_blank">mohamed.bou=
cadair@orange.com</a><span style=3D"font-family:&quot;MS Gothic&quot;">=E3=
=81=AE=E3=83=A1=E3=83=BC=E3=83=AB</span>:<u></u><u></u></div>
</div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u>=C2=A0<u></u></div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:rgb=
(31,73,125)">Hi all,</span><u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:rgb=
(31,73,125)">=C2=A0</span><u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:rgb=
(31,73,125)">Some easy to fix comments:</span><u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:rgb=
(31,73,125)">=C2=A0</span><u></u><u></u></div>
</div>
<div style=3D"margin-left:36pt">
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:11pt;font-family:Symbol;color:rgb(31,73,125)">=C2=
=B7</span><span style=3D"font-size:7pt;color:rgb(31,73,125)">=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<span>=C2=A0</span></span><span style=
=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:rgb(31,73,125)=
">You
 may consider adding more description to the actual usage of each TLVs.</sp=
an><u></u><u></u></div>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u>=C2=A0<u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
This document defines information elements rather than use cases for them. =
As such, I hesitate in adding too much usage which can be containing. That =
said, do you have specific thoughts on usage?<u></u><u></u></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<b><i><span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;col=
or:rgb(31,73,125)">[Med] I do have for some (content type, for example), bu=
t not sure about the others. For example, who sets the tenant-ID? Is it by =
control or
 extracted from the packets? Idem for the policy-ID. =C2=A0</span></i></b><=
span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:rgb(=
31,73,125)"><u></u><u></u></span></div>
</div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<br>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div><br>
</div>
<div><span style=3D"color:rgb(0,0,0)">[CMP] To me specific usages are outsi=
de scope. Many specifications in the IETF describe the fields while future =
companion documents define usage. This, to me, is one of those.</span></div=
></div></div></div></blockquote><div>GIM&gt;&gt; Yes, and there are example=
s when forward-looking definitions where taken from the document and moved =
into the document that explains how that object is used.=C2=A0</div><blockq=
uote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1p=
x solid rgb(204,204,204);padding-left:1ex"><div style=3D"overflow-wrap: bre=
ak-word;"><div><div>
<br>
<blockquote type=3D"cite">
<div>
<div style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-v=
ariant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:star=
t;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;t=
ext-decoration:none">
<div style=3D"border-style:none none none solid;border-left-width:1.5pt;bor=
der-left-color:blue;padding:0cm 0cm 0cm 4pt">
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<br>
<u></u><u></u></div>
<div>
<div style=3D"margin-left:36pt">
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:11pt;font-family:Symbol;color:rgb(31,73,125)">=C2=
=B7</span><span style=3D"font-size:7pt;color:rgb(31,73,125)">=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<span>=C2=A0</span></span><span style=
=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:rgb(31,73,125)=
">The
 TLVs content should also be clarified. For example, =E2=80=9CAkin, but not=
 identical to the usage described in [RFC6437]=E2=80=9D does not say what i=
s the diff vs. 6437 nor why not reusing FL would be sufficient if an IPv6 t=
ransport is used. =C2=A0</span><u></u><u></u></div>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u>=C2=A0<u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
Agreed. I would replace:<u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u>=C2=A0<u></u></div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0 =C2=A0Flow ID provides a representation of the flow.=C2=A0 Akin, but=
 not<u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0 =C2=A0identical to the usage described in [RFC6437].<u></u><u></u></=
div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u>=C2=A0<u></u></div>
</div>
<p class=3D"MsoNormal" style=3D"margin:0cm 0cm 12pt;font-size:12pt;font-fam=
ily:&quot;Times New Roman&quot;,serif">
With at least<u></u><u></u></p>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span>=C2=A0 =C2=A0The Flow ID provides a field in the NSH MD Type 2 to lab=
el<u></u><u></u></span></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span>=C2=A0 =C2=A0packets belonging to the same flow.=C2=A0 Absence of thi=
s field, or<u></u><u></u></span></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span>=C2=A0 =C2=A0a value of zero denotes that packets have not been label=
ed.<u></u><u></u></span></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span><u></u>=C2=A0<u></u></span></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<b><i><span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;col=
or:rgb(31,73,125)">[Med] That=E2=80=99s a good start. Thanks. The natural q=
uestions then are: what is a label? What to do with a labeled a packet? do =
we allow to change
 the label when progressing in an SFP? We need to think about this further.=
<span>=C2=A0</span></span></i></b><span style=3D"font-size:11pt;font-family=
:&quot;Courier New&quot;;color:rgb(31,73,125)"><u></u><u></u></span></div>
</div>
</div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<br>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div><br>
</div>
<div><font color=3D"#000000">[CMP] I did not mean to add a=C2=A0=E2=80=9Cla=
bel=E2=80=9D as a noun, but rather label as in mark or tag.=C2=A0</font></d=
iv>
<div><font color=3D"#000000"><br>
</font></div>
<div><span style=3D"color:rgb(0,0,0)">[CMP]=C2=A0</span><font color=3D"#000=
000">Immutability=C2=A0is a=C2=A0<span>great question! I tent to think that=
 it could change, but what do you
 think?=C2=A0</span></font></div>
<br>
<blockquote type=3D"cite">
<div>
<div style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-v=
ariant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:star=
t;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;t=
ext-decoration:none">
<div style=3D"border-style:none none none solid;border-left-width:1.5pt;bor=
der-left-color:blue;padding:0cm 0cm 0cm 4pt">
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<br>
<u></u><u></u></div>
<div>
<div style=3D"margin-left:36pt">
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:11pt;font-family:Symbol;color:rgb(31,73,125)">=C2=
=B7</span><span style=3D"font-size:7pt;color:rgb(31,73,125)">=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<span>=C2=A0</span></span><span style=
=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:rgb(31,73,125)=
">Clarify
 whether conveying multiple instances of each TLV is allowed.</span><u></u>=
<u></u></div>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u>=C2=A0<u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
That is not for this document to say.<span style=3D"color:rgb(31,73,125)"><=
u></u><u></u></span></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<b><i><span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;col=
or:rgb(31,73,125)">[Med] RFC8300 says the following:</span></i></b><span st=
yle=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:rgb(31,73,1=
25)"><u></u><u></u></span></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;">=C2=A0=
=C2=A0 If multiple instances of the same metadata are included in an NSH<u>=
</u><u></u></span></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;">=C2=A0=
=C2=A0 packet, but the definition of that Context Header does not allow for=
<u></u><u></u></span></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;">=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^<u></u><u></u><=
/span></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;">=C2=A0=
=C2=A0 it, the SFC-aware SF MUST process the first instance and ignore<u></=
u><u></u></span></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;">=C2=A0=
=C2=A0 ^^<u></u><u></u></span></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;">=C2=A0=
=C2=A0 subsequent instances.=C2=A0 The SFC-aware SF MAY log or increase a c=
ounter<u></u><u></u></span></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;">=C2=A0=
=C2=A0 for this event.<u></u><u></u></span></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<b><i><span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;col=
or:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></i></b></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
Some use cases can restrict to one interface for example, others to multipl=
e.</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div><br>
</div>
<div><span style=3D"color:rgb(0,0,0)">[CMP] Fair enough. We could add requi=
rements on multiplicity.</span></div></div></div></div></blockquote><div>GI=
M&gt;&gt; I agree that the question of multiple occurence of a TLV should b=
e specified for each TLV (or we can have a blanket statement with exception=
s though that might add to some confusion).=C2=A0</div><blockquote class=3D=
"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(2=
04,204,204);padding-left:1ex"><div style=3D"overflow-wrap: break-word;"><di=
v><div>
<br>
<blockquote type=3D"cite">
<div>
<div style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-v=
ariant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:star=
t;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;t=
ext-decoration:none">
<div style=3D"border-style:none none none solid;border-left-width:1.5pt;bor=
der-left-color:blue;padding:0cm 0cm 0cm 4pt">
<div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u><u></u></div>
</div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<br>
<br>
<u></u><u></u></div>
<div>
<div style=3D"margin-left:36pt">
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:11pt;font-family:Symbol;color:rgb(31,73,125)">=C2=
=B7</span><span style=3D"font-size:7pt;color:rgb(31,73,125)">=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<span>=C2=A0</span></span><span style=
=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:rgb(31,73,125)=
">What
 is a =E2=80=9Ca network-centric forwarding context=E2=80=9D?</span><u></u>=
<u></u></div>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u>=C2=A0<u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
Here=E2=80=99s my take on text proposal on various fields (this is full tex=
t, not diff):<u></u><u></u></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<b><i><span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;col=
or:rgb(31,73,125)">[Med] Thank you for drafting this. I hope I can provide =
text as well.</span></i></b></div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div><br>
</div>
<span style=3D"color:rgb(0,0,0)">[CMP]=C2=A0</span>Of course! That=E2=80=99=
s a back-of-napkin start only.</div>
<div><br>
<blockquote type=3D"cite">
<div>
<div style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-v=
ariant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:star=
t;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;t=
ext-decoration:none">
<div style=3D"border-style:none none none solid;border-left-width:1.5pt;bor=
der-left-color:blue;padding:0cm 0cm 0cm 4pt">
<div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:rgb=
(31,73,125)"><u></u><u></u></span></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u>=C2=A0<u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
4.1.=C2=A0 Forwarding Context<span>=C2=A0</span><u></u><u></u></div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u>=C2=A0<u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0 =C2=A0The forwarding context used for segregation and forwarding sco=
pe can<u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0 =C2=A0Take several forms depending on the network environment. For e=
xample,=C2=A0<u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0 =C2=A0<span>VXLAN/VXLAN-GPE VNID, VRF identification, and VLAN. This=
 context</span><u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span>=C2=A0 =C2=A0</span>header carries this network-based forwarding cont=
ext.<u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u>=C2=A0<u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
4.2.=C2=A0 Tenant Identifier<span>=C2=A0</span><u></u><u></u></div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u>=C2=A0<u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0 =C2=A0Tenant identification is often used for segregation within a m=
ulti-<u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0 =C2=A0tenant environment.=C2=A0 Orchestration system-generated tenan=
t IDs are an<u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0 =C2=A0example of such data. This context header carries both the for=
mat and=C2=A0<u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0 =C2=A0value of the Tenant identifier.<u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u>=C2=A0<u></u></div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin:0cm 0cm 12pt;font-size:12pt;font-fam=
ily:&quot;Times New Roman&quot;,serif">
4.3.=C2=A0 Content Type<u></u><u></u></p>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
// I believe this needs further thinking on the namespace fo Content Types,=
 could even be=C2=A0draft-penno-sfc-appid-05<u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u>=C2=A0<u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
4.4.=C2=A0 Ingress Network Information<span>=C2=A0</span><u></u><u></u></di=
v>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u>=C2=A0<u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0 =C2=A0This data identifies the ingress network node, and, if require=
d,<u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0 =C2=A0ingress interface.<u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u>=C2=A0<u></u></div>
</div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
// this should be split into Node and Ingress Interface.=C2=A0<u></u><u></u=
></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u>=C2=A0<u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
4.4.=C2=A0<span>Ingress Network Node Information</span><u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span><br>
<br>
</span><u></u><u></u></div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span>=C2=A0 =C2=A0This context header identifies the ingress network node.=
<u></u><u></u></span></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u>=C2=A0<u></u></div>
</div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u>=C2=A0<u></u></div>
</div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
4.5.=C2=A0<span>Ingress Network Interface Information</span><u></u><u></u><=
/div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span><br>
<br>
</span><u></u><u></u></div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span>=C2=A0 =C2=A0This context header identifies the ingress network inter=
face.<u></u><u></u></span></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u>=C2=A0<u></u></div>
</div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u>=C2=A0<u></u></div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin:0cm 0cm 12pt;font-size:12pt;font-fam=
ily:&quot;Times New Roman&quot;,serif">
4.6.=C2=A0 Flow ID<u></u><u></u></p>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span>=C2=A0 =C2=A0The Flow ID provides a field in the NSH MD Type 2 to lab=
el<u></u><u></u></span></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span>=C2=A0 =C2=A0packets belonging to the same flow.=C2=A0 Absence of thi=
s field, or<u></u><u></u></span></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span>=C2=A0 =C2=A0a value of zero denotes that packets have not been label=
ed.<u></u><u></u></span></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u>=C2=A0<u></u></div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin:0cm 0cm 12pt;font-size:12pt;font-fam=
ily:&quot;Times New Roman&quot;,serif">
...<u></u><u></u></p>
</div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<br>
<br>
<u></u><u></u></div>
<div>
<div style=3D"margin-left:36pt">
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:11pt;font-family:Symbol;color:rgb(31,73,125)">=C2=
=B7</span><span style=3D"font-size:7pt;color:rgb(31,73,125)">=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<span>=C2=A0</span></span><span style=
=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:rgb(31,73,125)=
">Section
 7: Please delete =E2=80=9CIANA is requested to create a new &quot;Network =
Service Header (NSH) TLV=E2=80=9D as we do already have a registry at:<span=
>=C2=A0</span><a href=3D"https://www.iana.org/assignments/nsh/nsh.xhtml#opt=
ional-variable-length-metadata-types" style=3D"color:purple;text-decoration=
:underline" target=3D"_blank"><span style=3D"color:purple">https://www.iana=
.org/assignments/nsh/nsh.xhtml#optional-variable-length-metadata-types</spa=
n></a>.
 You may use this NEW wording:</span><u></u><u></u></div>
</div>
<div style=3D"margin-left:36pt">
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:rgb=
(31,73,125)">=C2=A0</span><u></u><u></u></div>
</div>
<div style=3D"margin-left:18pt">
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;">=C2=A0=
=C2=A0 This document requests IANA to assign the following types from the</=
span><u></u><u></u></div>
</div>
<div style=3D"margin-left:18pt">
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;">=C2=A0=
=C2=A0 &quot;NSH IETF- Assigned Optional Variable-Length Metadata Types&quo=
t; (0x0000</span><u></u><u></u></div>
</div>
<div style=3D"margin-left:18pt">
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;">=C2=A0=
=C2=A0 IETF Base NSH MD Class) registry available at:</span><u></u><u></u><=
/div>
</div>
<div style=3D"margin-left:18pt">
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;">=C2=A0=
=C2=A0<span>=C2=A0</span><a href=3D"https://www.iana.org/assignments/nsh/ns=
h.xhtml#optional-variable-length-metadata-types" style=3D"color:purple;text=
-decoration:underline" target=3D"_blank"><span style=3D"color:purple">https=
://www.iana.org/assignments/nsh/nsh.xhtml#optional-variable-</span></a></sp=
an><u></u><u></u></div>
</div>
<div style=3D"margin-left:18pt">
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;">=C2=A0=
=C2=A0<span>=C2=A0</span><a href=3D"https://www.iana.org/assignments/nsh/ns=
h.xhtml#optional-variable-length-metadata-types" style=3D"color:purple;text=
-decoration:underline" target=3D"_blank"><span style=3D"color:purple">lengt=
h-metadata-types</span></a>.</span><u></u><u></u></div>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u>=C2=A0<u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
Indeed!!!<u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u>=C2=A0<u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
And additionally should move the Types to TBAs.<u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u>=C2=A0<u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
Thanks,<u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u>=C2=A0<u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
Carlos.<u></u><u></u></div>
</div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<br>
<br>
<u></u><u></u></div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:rgb=
(31,73,125)">=C2=A0</span><u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:rgb=
(31,73,125)">Thank you.</span><u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:rgb=
(31,73,125)">=C2=A0</span></div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div><br>
</div>
<div><font color=3D"#000000"><span>[CMP] You=C2=A0are welcome!</span></font=
></div>
<div><font color=3D"#000000"><span><br>
</span></font></div>
<div><font color=3D"#000000"><span>Carlos.</span></font></div>
<br>
<blockquote type=3D"cite">
<div>
<div style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-v=
ariant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:star=
t;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;t=
ext-decoration:none">
<div style=3D"border-style:none none none solid;border-left-width:1.5pt;bor=
der-left-color:blue;padding:0cm 0cm 0cm 4pt">
<div>
<div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:rgb=
(31,73,125)">Cheers,</span><u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:rgb=
(31,73,125)">Med</span><u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:11pt;font-family:&quot;Courier New&quot;;color:rgb=
(31,73,125)">=C2=A0</span><u></u><u></u></div>
</div>
<div style=3D"border-style:none none none solid;border-left-width:1.5pt;bor=
der-left-color:blue;padding:0cm 0cm 0cm 4pt">
<div>
<div style=3D"border-style:solid none none;border-top-width:1pt;border-top-=
color:rgb(181,196,223);padding:3pt 0cm 0cm">
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<b><span style=3D"font-size:10pt;font-family:Tahoma,sans-serif">De=C2=A0:</=
span></b><span><span style=3D"font-size:10pt;font-family:Tahoma,sans-serif"=
>=C2=A0</span></span><span style=3D"font-size:10pt;font-family:Tahoma,sans-=
serif">sfc
 [<a href=3D"mailto:sfc-bounces@ietf.org" style=3D"color:purple;text-decora=
tion:underline" target=3D"_blank">mailto:sfc-bounces@ietf.org</a>]<span>=C2=
=A0</span><b>De la part de</b><span>=C2=A0</span><a href=3D"mailto:wei.yueh=
ua@zte.com.cn" style=3D"color:purple;text-decoration:underline" target=3D"_=
blank">wei.yuehua@zte.com.cn</a><br>
<b>Envoy=C3=A9=C2=A0:</b><span>=C2=A0</span>lundi 30 mars 2020 09:</span><s=
pan lang=3D"FR" style=3D"font-size:10pt;font-family:Tahoma,sans-serif">29<b=
r>
<b>=C3=80=C2=A0:</b><span>=C2=A0</span><a href=3D"mailto:cpignata@cisco.com=
" style=3D"color:purple;text-decoration:underline" target=3D"_blank">cpigna=
ta@cisco.com</a>;<span>=C2=A0</span><a href=3D"mailto:sfc@ietf.org" style=
=3D"color:purple;text-decoration:underline" target=3D"_blank">sfc@ietf.org<=
/a><br>
<b>Cc=C2=A0:</b><span>=C2=A0</span><a href=3D"mailto:draft-ietf-sfc-nsh-tlv=
@ietf.org" style=3D"color:purple;text-decoration:underline" target=3D"_blan=
k">draft-ietf-sfc-nsh-tlv@ietf.org</a>;<span>=C2=A0</span><a href=3D"mailto=
:sfc@ietf.org" style=3D"color:purple;text-decoration:underline" target=3D"_=
blank">sfc@ietf.org</a><br>
<b>Objet=C2=A0:</b><span>=C2=A0</span>Re: [sfc] I-D Action: draft-ietf-sfc-=
nsh-tlv-02.txt</span><u></u><u></u></div>
</div>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:10.5pt;font-family:Arial,sans-serif">Dear Carlos,<=
/span><u></u><u></u></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:10.5pt;font-family:Arial,sans-serif">Thank you for=
 reminding this kind of modifications to the mailing list so that more peop=
le could notice and give comments.</span><u></u><u></u></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:10.5pt;font-family:Arial,sans-serif"><a href=3D"ht=
tps://tools.ietf.org/rfcdiff?url2=3Ddraft-ietf-sfc-nsh-tlv-02.txt" style=3D=
"color:purple;text-decoration:underline" target=3D"_blank"><span style=3D"c=
olor:purple">https://tools.ietf.org/rfcdiff?url2=3Ddraft-ietf-sfc-nsh-tlv-0=
2.txt</span></a></span><u></u><u></u></div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif;line-height:15.75pt">
<span style=3D"font-family:Arial,sans-serif">Your suggestion is reasonable.=
</span><u></u><u></u></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif;line-height:15.75pt">
<span style=3D"font-family:Arial,sans-serif">=C2=A0</span><u></u><u></u></d=
iv>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif;line-height:15.75pt">
<span style=3D"font-family:Arial,sans-serif">Does anyone aware of implement=
ations?=C2=A0</span><u></u><u></u></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif;line-height:15.75pt">
<span style=3D"font-family:Arial,sans-serif">or How do you think of TBAs?</=
span><u></u><u></u></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
I appreciate your comments.<u></u><u></u></div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
<div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<strong><span style=3D"font-family:Arial,sans-serif;color:rgb(0,142,211)">B=
est Regards,</span></strong><u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif;line-height:15pt">
<strong><span style=3D"font-family:&quot;Microsoft YaHei&quot;,sans-serif;c=
olor:rgb(38,38,38)">=E9=AD=8F=E6=9C=88=E5=8D=8E=C2=A0Corona Wei</span></str=
ong><u></u><u></u></div>
</div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-family:Arial,sans-serif;color:rgb(0,142,211)">M:=C2=A0<=
/span><span style=3D"font-family:&quot;Microsoft YaHei&quot;,sans-serif;col=
or:rgb(38,38,38)">+86 13851460269=C2=A0</span><span style=3D"font-family:Ar=
ial,sans-serif;color:rgb(0,142,211)">E:=C2=A0</span><span><span style=3D"fo=
nt-family:Arial,sans-serif"><a href=3D"mailto:wei.yuehua@zte.com.cn" style=
=3D"color:purple;text-decoration:underline" target=3D"_blank"><span style=
=3D"color:purple">wei.yuehua@zte.com.cn</span></a></span></span><u></u><u><=
/u></div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif;line-height:15pt">
=C2=A0<u></u><u></u></div>
</div>
</div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif;text-align:center;line-height:21pt;background-color=
:rgb(224,229,233)">
<span style=3D"font-family:&quot;MS Gothic&quot;;color:rgb(19,136,255)">=E5=
=8E=9F=E5=A7=8B</span><span style=3D"font-family:SimSun;color:rgb(19,136,25=
5)">=E9=82=AE=E4=BB=B6</span><u></u><u></u></div>
<div id=3D"gmail-m_5825471103590569699zwriteHistoryContainer">
<div>
<div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif;background-color:rgb(245,246,248)">
<strong><span style=3D"font-family:SimSun">=E5=8F=91=E4=BB=B6=E4=BA=BA=EF=
=BC=9A</span></strong><span>CarlosPignataro(cpignata) &lt;<a href=3D"mailto=
:cpignata@cisco.com" style=3D"color:purple;text-decoration:underline" targe=
t=3D"_blank">cpignata@cisco.com</a>&gt;</span><u></u><u></u></div>
</div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif;background-color:rgb(245,246,248)">
<strong><span style=3D"font-family:&quot;MS Gothic&quot;">=E6=94=B6=E4=BB=
=B6=E4=BA=BA=EF=BC=9A</span></strong><span><span style=3D"font-family:&quot=
;MS Gothic&quot;">=E9=AD=8F=E6=9C=88</span></span><span><span style=3D"font=
-family:SimSun">=E5=8D=8E</span></span><span>00019655;</span><u></u><u></u>=
</div>
</div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif;background-color:rgb(245,246,248)">
<strong><span style=3D"font-family:&quot;MS Gothic&quot;">=E6=8A=84=E9=80=
=81=E4=BA=BA=EF=BC=9A</span></strong><span><a href=3D"mailto:sfc@ietf.org" =
style=3D"color:purple;text-decoration:underline" target=3D"_blank">sfc@ietf=
.org</a><span>=C2=A0</span>&lt;<a href=3D"mailto:sfc@ietf.org" style=3D"col=
or:purple;text-decoration:underline" target=3D"_blank">sfc@ietf.org</a>&gt;=
;<a href=3D"mailto:draft-ietf-sfc-nsh-tlv@ietf.org" style=3D"color:purple;t=
ext-decoration:underline" target=3D"_blank">draft-ietf-sfc-nsh-tlv@ietf.org=
</a><span>=C2=A0</span>&lt;<a href=3D"mailto:draft-ietf-sfc-nsh-tlv@ietf.or=
g" style=3D"color:purple;text-decoration:underline" target=3D"_blank">draft=
-ietf-sfc-nsh-tlv@ietf.org</a>&gt;;</span><u></u><u></u></div>
</div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif;background-color:rgb(245,246,248)">
<strong><span style=3D"font-family:&quot;MS Gothic&quot;">=E6=97=A5</span><=
/strong><span><b>=C2=A0</b></span><strong><span style=3D"font-family:&quot;=
MS Gothic&quot;">=E6=9C=9F</span></strong><span><b>=C2=A0</b></span><strong=
><span style=3D"font-family:&quot;MS Gothic&quot;">=EF=BC=9A</span></strong=
>2020<span style=3D"font-family:&quot;MS Gothic&quot;">=E5=B9=B4</span>03<s=
pan style=3D"font-family:&quot;MS Gothic&quot;">=E6=9C=88</span>28<span sty=
le=3D"font-family:&quot;MS Gothic&quot;">=E6=97=A5</span><span>=C2=A0</span=
>21:49<u></u><u></u></div>
</div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif;background-color:rgb(245,246,248)">
<strong><span style=3D"font-family:&quot;MS Gothic&quot;">=E4=B8=BB</span><=
/strong><span><b>=C2=A0</b></span><strong><span style=3D"font-family:SimSun=
">=E9=A2=98</span></strong><span><b>=C2=A0</b></span><strong><span style=3D=
"font-family:&quot;MS Gothic&quot;">=EF=BC=9A</span></strong><strong>Re:
 [sfc] I-D Action: draft-ietf-sfc-nsh-tlv-02.txt</strong><u></u><u></u></di=
v>
</div>
</div>
</div>
<div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
Dear Wei,<u></u><u></u></div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
Thanks for the quick responses and accepting the suggestions.<u></u><u></u>=
</div>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
Only one follow-up on this, which I bring to the top:<u></u><u></u></div>
</div>
</div>
<div>
<blockquote style=3D"margin-top:5pt;margin-bottom:5pt">
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-family:Arial,sans-serif;color:rgb(0,112,192)">Wei&gt;&g=
t; Only editorial improvement.=C2=A0</span><u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-family:Arial,sans-serif;color:rgb(0,112,192)">The Types=
 in previous version were:</span><u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"color:rgb(0,112,192)">0x1, =C2=A0 =C2=A00x4, =C2=A0 =C2=A00x=
6, =C2=A0=C2=A00x7, =C2=A00x8, =C2=A0 =C2=A0=C2=A00x9</span><span style=3D"=
font-family:&quot;MS Gothic&quot;;color:rgb(0,112,192)">=EF=BC=8C</span><sp=
an><span style=3D"color:rgb(0,112,192)">=C2=A0</span></span><span style=3D"=
color:rgb(0,112,192)">=C2=A00xA</span><span style=3D"font-family:&quot;MS G=
othic&quot;;color:rgb(0,112,192)">=EF=BC=8C</span><span><span style=3D"colo=
r:rgb(0,112,192)">=C2=A0</span></span><span style=3D"color:rgb(0,112,192)">=
=C2=A00xB</span><u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"color:rgb(0,112,192)">The Types in current version are:</spa=
n><u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"color:rgb(0,112,192)">0x01, =C2=A00x02, =C2=A00x03,=C2=A00x0=
4,0x05</span><span style=3D"font-family:&quot;MS Gothic&quot;;color:rgb(0,1=
12,192)">=EF=BC=8C</span><span style=3D"color:rgb(0,112,192)">0x06</span><s=
pan style=3D"font-family:&quot;MS Gothic&quot;;color:rgb(0,112,192)">=EF=BC=
=8C</span><span style=3D"color:rgb(0,112,192)">0x07</span><span style=3D"fo=
nt-family:&quot;MS Gothic&quot;;color:rgb(0,112,192)">=EF=BC=8C</span><span=
 style=3D"color:rgb(0,112,192)">0x08</span><u></u><u></u></div>
</div>
</blockquote>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
I do not believe that changing a protocol value is an editorial change (or =
editorial improvement) necessarily.=C2=A0<u></u><u></u></div>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
Are there implementations following the previous allocations? Unused values=
 in between might look weird but it is to necessarily unoptimized, unimprov=
ed, or wrong.<u></u><u></u></div>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
If a goal is to have a gapless increasing list and there are no implementat=
ions, then TBAs can be used and assignment at the end (e.g., if we split th=
e node/interface into two).<u></u><u></u></div>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
On the other hand, I=E2=80=99d always prioritize implementations (the entro=
py of reality will take care of disorganize the list :-)<u></u><u></u></div=
>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
I=E2=80=99d leave them as they were, since there are enough numbers in the =
space, or ask on the list for changing and wait.<u></u><u></u></div>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
Thanks,<u></u><u></u></div>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
Carlos.<u></u><u></u></div>
</div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<br>
<br>
<br>
<u></u><u></u></div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
2020/03/27<span>=C2=A0</span><span style=3D"font-family:&quot;MS Gothic&quo=
t;">=E5=8D=88=E5=BE=8C</span>11:13<span style=3D"font-family:&quot;MS Gothi=
c&quot;">=E3=80=81</span><a href=3D"mailto:wei.yuehua@zte.com.cn" style=3D"=
color:purple;text-decoration:underline" target=3D"_blank"><span style=3D"co=
lor:purple">wei.yuehua@zte.com.cn</span></a><span style=3D"font-family:&quo=
t;MS Gothic&quot;">=E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB</span>:<u></u><u></=
u></div>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
</div>
<div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:10.5pt;font-family:Arial,sans-serif">Dear Carlos,<=
/span><u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:10.5pt;font-family:Arial,sans-serif">I appreciated=
 your comments.</span><u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:10.5pt;font-family:Arial,sans-serif">Please see my=
 response in line with Wei&gt;&gt; tag</span><u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<strong><span style=3D"font-size:10.5pt;font-family:Arial,sans-serif;color:=
rgb(0,142,211)">Best Regards,</span></strong><u></u><u></u></div>
</div>
<div>
<div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif;line-height:15pt">
<strong><span style=3D"font-family:&quot;Microsoft YaHei&quot;,sans-serif;c=
olor:rgb(38,38,38)">=E9=AD=8F=E6=9C=88=E5=8D=8E=C2=A0Corona Wei</span></str=
ong><u></u><u></u></div>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-family:Arial,sans-serif;color:rgb(0,142,211)">M:=C2=A0<=
/span><span style=3D"font-family:&quot;Microsoft YaHei&quot;,sans-serif;col=
or:rgb(38,38,38)">+86 13851460269=C2=A0</span><span style=3D"font-family:Ar=
ial,sans-serif;color:rgb(0,142,211)">E:=C2=A0</span><span><span style=3D"fo=
nt-family:Arial,sans-serif"><a href=3D"mailto:wei.yuehua@zte.com.cn" style=
=3D"color:purple;text-decoration:underline" target=3D"_blank"><span style=
=3D"color:purple">wei.yuehua@zte.com.cn</span></a></span></span><u></u><u><=
/u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
</div>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
</div>
</div>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
</div>
</div>
</div>
</div>
</div>
<div>
<div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif;background-color:rgb(245,246,248)">
<strong><span style=3D"font-family:SimSun">=E5=8F=91=E4=BB=B6=E4=BA=BA=EF=
=BC=9A</span></strong><span>CarlosPignataro(cpignata) &lt;<a href=3D"mailto=
:cpignata=3D40cisco.com@dmarc.ietf.org" style=3D"color:purple;text-decorati=
on:underline" target=3D"_blank"><span style=3D"color:purple">cpignata=3D40c=
isco.com@dmarc.ietf.org</span></a>&gt;</span><u></u><u></u></div>
</div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif;background-color:rgb(245,246,248)">
<strong><span style=3D"font-family:&quot;MS Gothic&quot;">=E6=94=B6=E4=BB=
=B6=E4=BA=BA=EF=BC=9A</span></strong><span><a href=3D"mailto:sfc@ietf.org" =
style=3D"color:purple;text-decoration:underline" target=3D"_blank"><span st=
yle=3D"color:purple">sfc@ietf.org</span></a></span><span>=C2=A0</span><span=
>&lt;<a href=3D"mailto:sfc@ietf.org" style=3D"color:purple;text-decoration:=
underline" target=3D"_blank"><span style=3D"color:purple">sfc@ietf.org</spa=
n></a>&gt;;</span><u></u><u></u></div>
</div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif;background-color:rgb(245,246,248)">
<strong><span style=3D"font-family:&quot;MS Gothic&quot;">=E6=8A=84=E9=80=
=81=E4=BA=BA=EF=BC=9A</span></strong><span><a href=3D"mailto:draft-ietf-sfc=
-nsh-tlv@ietf.org" style=3D"color:purple;text-decoration:underline" target=
=3D"_blank"><span style=3D"color:purple">draft-ietf-sfc-nsh-tlv@ietf.org</s=
pan></a></span><span>=C2=A0</span><span>&lt;<a href=3D"mailto:draft-ietf-sf=
c-nsh-tlv@ietf.org" style=3D"color:purple;text-decoration:underline" target=
=3D"_blank"><span style=3D"color:purple">draft-ietf-sfc-nsh-tlv@ietf.org</s=
pan></a>&gt;;</span><u></u><u></u></div>
</div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif;background-color:rgb(245,246,248)">
<strong><span style=3D"font-family:&quot;MS Gothic&quot;">=E6=97=A5</span><=
/strong><span><b>=C2=A0</b></span><strong><span style=3D"font-family:&quot;=
MS Gothic&quot;">=E6=9C=9F</span></strong><span><b>=C2=A0</b></span><strong=
><span style=3D"font-family:&quot;MS Gothic&quot;">=EF=BC=9A</span></strong=
>2020<span style=3D"font-family:&quot;MS Gothic&quot;">=E5=B9=B4</span>03<s=
pan style=3D"font-family:&quot;MS Gothic&quot;">=E6=9C=88</span>27<span sty=
le=3D"font-family:&quot;MS Gothic&quot;">=E6=97=A5</span><span>=C2=A0</span=
>02:36<u></u><u></u></div>
</div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif;background-color:rgb(245,246,248)">
<strong><span style=3D"font-family:&quot;MS Gothic&quot;">=E4=B8=BB</span><=
/strong><span><b>=C2=A0</b></span><strong><span style=3D"font-family:SimSun=
">=E9=A2=98</span></strong><span><b>=C2=A0</b></span><strong><span style=3D=
"font-family:&quot;MS Gothic&quot;">=EF=BC=9A</span></strong><strong>Re:
 [sfc] I-D Action: draft-ietf-sfc-nsh-tlv-02.txt</strong><u></u><u></u></di=
v>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin:0cm 0cm 12pt;font-size:12pt;font-fam=
ily:&quot;Times New Roman&quot;,serif">
_______________________________________________<br>
sfc=C2=A0mailing=C2=A0list<br>
<a href=3D"mailto:sfc@ietf.org" style=3D"color:purple;text-decoration:under=
line" target=3D"_blank"><span style=3D"color:purple">sfc@ietf.org</span></a=
><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/sfc" style=3D"color:purple=
;text-decoration:underline" target=3D"_blank">https://www.ietf.org/mailman/=
listinfo/sfc</a><u></u><u></u></p>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
Hi, SFC,<u></u><u></u></div>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
Apologies, a late response to=C2=A0<a href=3D"https://mailarchive.ietf.org/=
arch/msg/sfc/pNT0kOnFHZeTBLXjuIH0hoKhJs4/" style=3D"color:purple;text-decor=
ation:underline" target=3D"_blank"><span style=3D"color:purple">https://mai=
larchive.ietf.org/arch/msg/sfc/pNT0kOnFHZeTBLXjuIH0hoKhJs4/</span></a><u></=
u><u></u></div>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
Looking at the document I=E2=80=99ve got a few comments, prefaced with =E2=
=80=9CCMP=E2=80=9D:<u></u><u></u></div>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
</div>
<div>
<div style=3D"border:1pt solid rgb(204,204,204);padding:8pt">
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">2.1.=C2=A0 Terminology</span><u></u><u></u></pre>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
CMP: Instead of duplicating definition of terms, why not point to RFC 8300 =
and RFC 7665 as needed, and only define new terms.<u></u><u></u></div>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<br>
<span style=3D"font-family:Arial,sans-serif;color:rgb(0,112,192)">Wei&gt;&g=
t; Will delete duplicated NSH, MD Type and SFC which have been defined in=
=C2=A0=C2=A0RFC 8300 and RFC 7665</span><u></u><u></u></div>
</div>
<div>
<div style=3D"border:1pt solid rgb(204,204,204);padding:8pt">
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A01=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 2=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0 3</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0 1 2 3 4 5 6=
 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1</span><u></u><u></u></pr=
e>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +-+-+-+-+-+-+-+-+-+=
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |Ver|O|C|R|R|R|R|R|=
R|=C2=A0=C2=A0 Length=C2=A0 |=C2=A0=C2=A0=C2=A0 MD Type=C2=A0=C2=A0=C2=A0 |=
 Next Protocol |</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +-+-+-+-+-+-+-+-+-+=
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0 Figure 1: NSH Base Header</span><u></u><u></u></pre>
</div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
CMP: This is an old version, missing TTLL from RFC 88300<u></u><u></u></div=
>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-family:Arial,sans-serif;color:rgb(0,112,192)">Wei&gt;&g=
t; Will modify this figure to align with RFC8300</span><u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
</div>
<div>
<div style=3D"border:1pt solid rgb(204,204,204);padding:8pt">
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0 where</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Metadata Class (MD =
Class): Defines the scope of the Type field to</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 provide a hierarchi=
cal namespace.</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Type - Indicates th=
e explicit type of metadata being carried.=C2=A0 The</span><u></u><u></u></=
pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 value is one from t=
he Network Service Header (NSH) TLV Type</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 registry (Section 7=
).</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Unassigned bit: One=
 unassigned bit is available for future use.</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 This bit MUST NOT b=
e set, and it MUST be ignored on receipt.</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Length: Indicates t=
he length of the variable-length metadata, in</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 bytes.=C2=A0 In cas=
e the metadata length is not an integer number of</span><u></u><u></u></pre=
>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 4-byte words, the s=
ender MUST add pad bytes immediately following</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 the last metadata b=
yte to extend the metadata to an integer number</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 of 4-byte words.=C2=
=A0 The receiver MUST round the Length field up to</span><u></u><u></u></pr=
e>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 the nearest 4-byte-=
word boundary, to locate and process the next</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 field in the packet=
.=C2=A0 The receiver MUST access only those bytes in</span><u></u><u></u></=
pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 the metadata indica=
ted by the Length field (i.e., actual number of</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 bytes) and MUST ign=
ore the remaining bytes up to the nearest 4-</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 byte-word boundary.=
=C2=A0 The length may be 0 or greater.</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 A value of 0 denote=
s a Context Header without a Variable-Length</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Metadata field.</sp=
an><u></u><u></u></pre>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
CMP: Instead of copy/paste repeating this from RFC 8300, please add a point=
er. Copy/past text gets desynchronized easily.<u></u><u></u></div>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-family:Arial,sans-serif;color:rgb(0,112,192)">Wei&gt;&g=
t; wil delete this part.</span><u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
</div>
<div>
<div style=3D"border:1pt solid rgb(204,204,204);padding:8pt">
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">4.2.=C2=A0 Tenant Identifier</span><u></u><u></u><=
/pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0 Tenant identification is often used f=
or segregation within a multi-</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0 tenant environment.=C2=A0 Orchestrati=
on system-generated tenant IDs are an</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0 example of such data.</span><u></u><u=
></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0 1=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 2=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 3</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0 1 2 3 4 5 6=
 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1</span><u></u><u></u></pr=
e>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +-+-+-+-+-+-+-+-+-+=
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+</span><u></u><u></u></pre>
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0=
 Metadata Class =3D 0x0000=C2=A0=C2=A0=C2=A0 |=C2=A0 Type =3D 0x02=C2=A0 |U=
|=C2=A0 Length=3D12=C2=A0 |</span><u></u><u></u></pre>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
CMP: Seems like this Type, as well as others, were changed from the previou=
s version. Why?<u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-family:Arial,sans-serif;color:rgb(0,112,192)">Wei&gt;&g=
t; Only editorial improvement.=C2=A0</span><u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-family:Arial,sans-serif;color:rgb(0,112,192)">The Types=
 in previous version were:</span><u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"color:rgb(0,112,192)">0x1, =C2=A0 =C2=A00x4, =C2=A0 =C2=A00x=
6, =C2=A0=C2=A00x7, =C2=A00x8, =C2=A0 =C2=A0=C2=A00x9</span><span style=3D"=
font-family:&quot;MS Gothic&quot;;color:rgb(0,112,192)">=EF=BC=8C</span><sp=
an><span style=3D"color:rgb(0,112,192)">=C2=A0</span></span><span style=3D"=
color:rgb(0,112,192)">=C2=A00xA</span><span style=3D"font-family:&quot;MS G=
othic&quot;;color:rgb(0,112,192)">=EF=BC=8C</span><span><span style=3D"colo=
r:rgb(0,112,192)">=C2=A0</span></span><span style=3D"color:rgb(0,112,192)">=
=C2=A00xB</span><u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"color:rgb(0,112,192)">The Types in current version are:</spa=
n><u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"color:rgb(0,112,192)">0x01, =C2=A00x02, =C2=A00x03,=C2=A00x0=
4,0x05</span><span style=3D"font-family:&quot;MS Gothic&quot;;color:rgb(0,1=
12,192)">=EF=BC=8C</span><span style=3D"color:rgb(0,112,192)">0x06</span><s=
pan style=3D"font-family:&quot;MS Gothic&quot;;color:rgb(0,112,192)">=EF=BC=
=8C</span><span style=3D"color:rgb(0,112,192)">0x07</span><span style=3D"fo=
nt-family:&quot;MS Gothic&quot;;color:rgb(0,112,192)">=EF=BC=8C</span><span=
 style=3D"color:rgb(0,112,192)">0x08</span><u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
</div>
<div>
<div style=3D"border:1pt solid rgb(204,204,204);padding:8pt">
<pre style=3D"margin:0cm 0cm 7.9pt;font-size:10pt;font-family:&quot;Courier=
 New&quot;;background-color:rgb(255,253,245);word-break:break-all"><span st=
yle=3D"font-size:10.5pt">7.=C2=A0 IANA Considerations</span><u></u><u></u><=
/pre>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
CMP: This needs registration:=C2=A0Metadata Class =3D 0x0000<u></u><u></u><=
/div>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
CMP: Also, the=C2=A0Context Type (CT) needs registration.<u></u><u></u></di=
v>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
CMP: And these as well:<u></u><u></u></div>
</div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
*=C2=A0Tenant Type (TT)<u></u><u></u></div>
</div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
*=C2=A0Group Type (GT)<u></u><u></u></div>
</div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
*=C2=A0URI Type<u></u><u></u></div>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-family:Arial,sans-serif;color:rgb(0,112,192)">Wei&gt;&g=
t; Will follow your advice.</span><u></u><u></u></div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
Thanks!<u></u><u></u></div>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
</div>
<div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
Carlos.<u></u><u></u></div>
</div>
</div>
<div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
</div>
</div>
</div>
</div>
</div>
</div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
=C2=A0<u></u><u></u></div>
</div>
</div>
</div>
<div style=3D"margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Time=
s New Roman&quot;,serif">
<span style=3D"font-size:9pt;font-family:Helvetica,sans-serif">____________=
___________________________________<br>
sfc mailing list<br>
</span><a href=3D"mailto:sfc@ietf.org" style=3D"color:purple;text-decoratio=
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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Wed, 1 Apr 2020 16:58:16 -0700
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To: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
Cc: "Joel M. Halpern" <jmh@joelhalpern.com>, "sfc@ietf.org" <sfc@ietf.org>
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Subject: Re: [sfc] draft-ietf-sfc-proof-of-transit-04 ready for WGLC? (was RE: PoT review/comments)
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Carlos,
after reading Joel's conditional MUST I've reconsidered my position. I
agree with the text he proposed.

Regards,
Greg

On Wed, Apr 1, 2020 at 4:47 PM Carlos Pignataro (cpignata) <
cpignata@cisco.com> wrote:

> Greg,
>
> I understood Joel=E2=80=99s reasoning to be different than yours, and dif=
ferent
> his position also (I understood Joel to be OK either way with a preferenc=
e
> for Normative, and later he gave a suggestion of a conditional MUST, whil=
e
> your position seemed to me an absolute MUST, more terminal and inflexible=
).
>
> For completeness, this was the question I asked you, under the context of
> the IESG note in [1] below:
>
> Is the technology in draft-ietf-sfc-ioam-nsh a =E2=80=9Cmust=E2=80=9D for
>> draft-ietf-sfc-proof-of-transit?
>
>
> What do you think?
>
> Best,
>
> Carlos.
>
>
> 2020/04/01 =E5=8D=88=E5=BE=8C7:28=E3=80=81Greg Mirsky <gregimirsky@gmail.=
com>=E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:
>
> Dear Carlos,
> I believe that Joel has expressed it clearly and I concur with his
> reasoning.
>
> Regards,
> Greg
>
> On Wed, Apr 1, 2020 at 4:13 PM Carlos Pignataro (cpignata) <
> cpignata@cisco.com> wrote:
>
>> Dear Greg,
>>
>> This seems to be a rephrase of the previous email, yet I still do not
>> follow the cause-effect in your argument.
>>
>> Normative does not mean =E2=80=9Ca reference that defines technology wit=
hin the
>> same Working Group=E2=80=99s documents that can be used=E2=80=9D.
>>
>> The definition and clarification statement at [1] says =E2=80=9Cdocument=
s that
>> must be read to understand or implement the technology in the new RFC=E2=
=80=9D. It
>> does not speak to WG charters or.
>>
>> Is the technology in draft-ietf-sfc-ioam-nsh a =E2=80=9Cmust=E2=80=9D fo=
r
>> draft-ietf-sfc-proof-of-transit? It seems to me that the only =E2=80=9Cm=
ust=E2=80=9D
>> technology is ippm-ioam-data. I appreciate that this is also not
>> necessarily a yes/no binary answer...
>>
>> [Again, I am OK either way, for the right reason]
>>
>> Carlos.
>>
>> [1]
>> https://www.ietf.org/about/groups/iesg/statements/normative-informative-=
references/
>>
>>
>> > 2020/04/01 =E5=8D=88=E5=BE=8C3:36=E3=80=81Greg Mirsky <gregimirsky@gma=
il.com>=E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:
>> >
>> > Dear Carlos,
>> > in my previous note I have recognized that POT, as SFC, can be realize=
d
>> using different techniques. But this is SFC WG document and, as I
>> understand the charter of SFC WG, we're defining technologies that use S=
FC
>> NSH. Hence my conclusion that the reference to draft-ietf-sfc-ioam-nsh
>> should be normative, as that is the only document that defines iOAM
>> encapsulation in NSH. Making the reference informational could be
>> interpreted as suggestion that POT in SFC NSH might be encapsulated not =
as
>> iOAM but in some other manner. And while that is possible, I don't see a
>> proposal that describes such alternative encapsulation. So, it appears t=
hat
>> the WG has agreed that POT in SFC NSH should use encapsulation as define=
d
>> in draft-ietf-sfc-ioam-nsh.
>> >
>> > Regards,
>> > Greg
>> >
>> > On Wed, Apr 1, 2020 at 12:16 PM Carlos Pignataro (cpignata) <
>> cpignata@cisco.com> wrote:
>> > Dear Greg,
>> >
>> > > 2020/04/01 =E5=8D=88=E5=BE=8C2:59=E3=80=81Greg Mirsky <gregimirsky@g=
mail.com>=E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:
>> > >
>> > > Dear All,
>> > > I agree with Joel that the reference in
>> draft-ietf-sfc-proof-of-transit to draft-ietf-ippm-ioam-data should be
>> normative.
>> >
>> > Great. Everyone seems to be aligned on this point.
>> >
>> >
>> > > I also support the proposal to add in draft-ietf-sfc-proof-of-transi=
t
>> a normative reference to draft-ietf-sfc-ioam-nsh. SFC WG is working on
>> defining SFC that is based on NSH (SFC NSH), and while SFC might be
>> realized using other techniques, draft-ietf-sfc-ioam-nsh is, and likely
>> will remain, the only document that is describing iOAM encapsulation in =
SFC
>> NSH. Thus, I believe, for SFC WG, implementation of PoT based on iOAM
>> requires implementation of iOAM encapsulation in SFC NSH, as defined in
>> draft-ietf-sfc-ioam-nsh. Hence, the reference must be normative.
>> >
>> >
>> > This logic is flawed in the onset. The main point is that POT can be
>> realized with a variety of transports and technologies and use-cases, on=
e
>> of which is SFC, and then further within SFC one of which is NSH.
>> >
>> > You seem to argue that NSH is somehow in practice the only SFC
>> realization, and because of that the reference =E2=80=9Cmust be normativ=
e=E2=80=9D.
>> >
>> > I disagree with the premise, but regardless, it does not matter since
>> POT applies to other non-SFC(-non-NSH) technologies. Therefore that
>> since-then logic does not apply.
>> >
>> > Copying the very first sentence of the Abstract:
>> >
>> >    Several technologies such as Traffic Engineering (TE), Service
>> >    Function Chaining (SFC), and policy based routing [...]
>> >
>> >
>> > And now looking at this fragment, I am more convinced that this is one
>> example and as such Informative.
>> >
>> > I would not object to Normative for the right reasons, but the reason
>> above, in my mind, does not follow.
>> >
>> > Thanks,
>> >
>> > Carlos.
>> >
>> >
>> > >
>> > > Regards,
>> > > Greg
>> > >
>> > > On Tue, Mar 24, 2020 at 2:25 PM Joel M. Halpern <jmh@joelhalpern.com=
>
>> wrote:
>> > > I think we all agree that draft-ietf-sfc-proof-of-transit requires
>> the
>> > > normative reference to draft-ietf-ippm-ioam-data.
>> > >
>> > > Regarding a reference from draft-ietf-sfc-proof-of-transit to
>> > > draft-ietf-sfc-ioam-nsh, I think we agree that it is needed.  The
>> > > question then is normative or informative.  If we use the usual IETF
>> > > rule that there has to be a defined normative way to interoperably
>> > > implement a protocol spec (with other options allowed), my
>> inclination
>> > > is that the reference should be normative.
>> > >
>> > > Regarding the informative reference in the other direction from
>> > > draft-ietf-sfc-ioam-nsh to draft-ietf-sfc-proof-of-transit, while I
>> > > personally like the idea, that is up to you / the working group.
>> > >
>> > > Yours,
>> > > Joel
>> > >
>> > > On 3/24/2020 5:20 PM, Carlos Pignataro (cpignata) wrote:
>> > > > Hi, Joel,
>> > > >
>> > > > The way in which the doc hierarchy and relationship is structure
>> seems
>> > > > to support and potentially even require:
>> > > >
>> > > > From draft-ietf-sfc-proof-of-transit:
>> > > > * A normative reference to [I-D.ietf-ippm-ioam-data], since PoT
>> gives
>> > > > over IOAM explicitly, and that exists.
>> > > > * Optionally, an Informative reference to draft-ietf-sfc-ioam-nsh,
>> since
>> > > > that=E2=80=99s really one out of many ways to carry IOAM over NSH,=
 but
>> separated
>> > > > by document indirection. This does not exist but can be added.
>> > > >
>> > > >  From draft-ietf-sfc-ioam-nsh:
>> > > > * Optionally, an Informative reference to
>> > > > draft-ietf-sfc-proof-of-transit, since that=E2=80=99s one out of m=
any
>> > > > applications. This does not exist but can be added.
>> > > >
>> > > > Thoughts?
>> > > >
>> > > > Best,
>> > > >
>> > > > Carlos.
>> > > >
>> > > >> 2020/03/24 =E5=8D=88=E5=BE=8C5:10=E3=80=81Joel M. Halpern <jmh@jo=
elhalpern.com
>> > > >> <mailto:jmh@joelhalpern.com>>=E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB=
:
>> > > >>
>> > > >> Carlos, it sounds like there should probably be a normative
>> reference
>> > > >> from draft-ietf-sfc-proof of transit to draft-ietf-sfc-ioam-nsh?
>> > > >> Possibly in the same sentence that refers to
>> draft-ietf-ippm-ioam-data?
>> > > >>
>> > > >> Yours,
>> > > >> Joel
>> > > >>
>> > > >> On 3/24/2020 4:54 PM, Carlos Pignataro (cpignata) wrote:
>> > > >>> Greg,
>> > > >>> The very first sentence of the PoT document reads:
>> > > >>>    Several technologies such as Traffic Engineering (TE), Servic=
e
>> > > >>>    Function Chaining (SFC), and policy based routing are used to
>> steer
>> > > >>>    traffic through a specific, user-defined path.  This document
>> defines
>> > > >>> Explaining how this document is applicable to various
>> > > >>> traffic-steering technologies.
>> > > >>> Section 3 then explains:
>> > > >>>    The POT information is encapsulated in packets as an IOAM
>> Proof Of
>> > > >>>    Transit Option.  The details and format of the encapsulation
>> and the
>> > > >>>    POT Option format are specified in [I-D.ietf-ippm-ioam-data].
>> > > >>> Which shows how to carry PoT in IOAM, with an appropriate pointe=
r.
>> > > >>> Lastly, draft-ietf-sfc-ioam-nsh-03 defines IOAM over an NSH
>> > > >>> encapsulation.
>> > > >>> This arrangements maximizes specification modularity and
>> > > >>> portability/reusability.
>> > > >>> Best,
>> > > >>> Carlos.
>> > > >>>> 2020/03/24 =E5=8D=88=E5=BE=8C4:48=E3=80=81Greg Mirsky <gregimir=
sky@gmail.com
>> > > >>>> <mailto:gregimirsky@gmail.com> <mailto:gregimirsky@gmail.com
>> >>=E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:
>> > > >>>>
>> > > >>>> Hi Joel,
>> > > >>>> thank you for the most expedient response. As I understand it,
>> iOAM
>> > > >>>> Data draft describes the format of the informational element
>> that
>> > > >>>> carries POT-related information but it does not define how the
>> > > >>>> element to be carried in case of NSH encapsulation. And that is
>> what
>> > > >>>> I was asking, apologies for not being clear in my first note.
>> > > >>>>
>> > > >>>> Regards,
>> > > >>>> Greg
>> > > >>>>
>> > > >>>> On Tue, Mar 24, 2020 at 1:42 PM Joel M.. Halpern
>> > > >>>> <jmh@joelhalpern.com <mailto:jmh@joelhalpern.com>
>> > > >>>> <mailto:jmh@joelhalpern.com>> wrote:
>> > > >>>>
>> > > >>>>    Regarding the information carriage, the PoT document points
>> to the
>> > > >>>>    IOAM
>> > > >>>>    document.
>> > > >>>>
>> https://tools.ietf.org/html/draft-ietf-ippm-ioam-data-08#section-4.5
>> > > >>>>    gives the format (and ways to have other formats if needed.)
>> > > >>>>
>> > > >>>>    Yours,
>> > > >>>>    Joel
>> > > >>>>
>> > > >>>>    On 3/24/2020 4:26 PM, Greg Mirsky wrote:
>> > > >>>>    > Hi Frank,
>> > > >>>>    > thank you for reminding us about this important work,
>> indeed we
>> > > >>>>    should
>> > > >>>>    > complete it. I've reviewed the draft and have several
>> questions.
>> > > >>>>    Please
>> > > >>>>    > kindly consider:
>> > > >>>>    >
>> > > >>>>    >   * I couldn't find information where, relative to NSH, RN=
D
>> and
>> > > >>>>    CML are
>> > > >>>>    >     transported
>> > > >>>>    >   * for YANG data models using "reference" is strongly
>> > > >>>>    encouraged as it
>> > > >>>>    >     provides a pointer to the specification. Since the POT
>> data
>> > > >>>>    model is
>> > > >>>>    >     in the same document as the POT specification, listing
>> the
>> > > >>>>    >     appropriate section should suffice
>> > > >>>>    >
>> > > >>>>    > Regards,
>> > > >>>>    > Greg
>> > > >>>>    >
>> > > >>>>    > On Thu, Mar 19, 2020 at 6:45 AM Frank Brockners (fbrockne)
>> > > >>>>    > <fbrockne=3D40cisco.com@dmarc.ietf.org
>> > > >>>> <mailto:fbrockne=3D40cisco.com@dmarc.ietf.org>
>> > > >>>>    <mailto:40cisco.com@dmarc.ietf.org>
>> > > >>>>    > <mailto:40cisco.com@dmarc.ietf.org
>> > > >>>>    <mailto:40cisco.com@dmarc.ietf.org>>> wrote:
>> > > >>>>    >
>> > > >>>>    >     Dear SFC WG,____
>> > > >>>>    >
>> > > >>>>    >     __ __
>> > > >>>>    >
>> > > >>>>    >     It=E2=80=99s been a while since we posted
>> > > >>>>    draft-ietf-sfc-proof-of-transit-04
>> > > >>>>    >     which addressed all known comments =E2=80=93 see below=
.
>> > > >>>>    >     I=E2=80=99ve not seen any more recent comments or ques=
tions
>> come up
>> > > >>>>    =E2=80=93 and
>> > > >>>>    >     we=E2=80=99ve been through quite a few discussions and=
 reviews
>> of this
>> > > >>>>    >     document already.____
>> > > >>>>    >
>> > > >>>>    >     __ __
>> > > >>>>    >
>> > > >>>>    >     Thus the question: Are we ready for WG LC?____
>> > > >>>>    >
>> > > >>>>    >     __ __
>> > > >>>>    >
>> > > >>>>    >     Thanks, Frank____
>> > > >>>>    >
>> > > >>>>    >     __ __
>> > > >>>>    >
>> > > >>>>    >     *From:* Frank Brockners (fbrockne)
>> > > >>>>    >     *Sent:* Donnerstag, 21. November 2019 08:21
>> > > >>>>    >     *To:* Alejandro Aguado FI <a.aguadom@fi.upm.es
>> > > >>>> <mailto:a.aguadom@fi.upm.es>
>> > > >>>>    <mailto:a.aguadom@fi.upm.es>
>> > > >>>>    >     <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.e=
s
>> >>>;
>> > > >>>>    Diego R. Lopez
>> > > >>>>    >     <diego.r.lopez@telefonica.com
>> > > >>>> <mailto:diego.r.lopez@telefonica.com>
>> > > >>>>    <mailto:diego.r.lopez@telefonica.com>
>> > > >>>>    >     <mailto:diego.r.lopez@telefonica.com
>> > > >>>>    <mailto:diego.r.lopez@telefonica.com>>>; Carlos Pignataro
>> (cpignata)
>> > > >>>>    >     <cpignata@cisco.com <mailto:cpignata@cisco.com>
>> > > >>>> <mailto:cpignata@cisco.com>
>> > > >>>>    <mailto:cpignata@cisco.com <mailto:cpignata@cisco..com>>>;
>> > > >>>>    ALEJANDRO AGUADO
>> > > >>>>    >     MARTIN <alejandro.aguadomartin.ext@telefonica.com
>> > > >>>> <mailto:alejandro.aguadomartin.ext@telefonica.com>
>> > > >>>>    <mailto:alejandro.aguadomartin..ext@telefonica.com>
>> > > >>>>    >     <mailto:alejandro.aguadomartin.ext@telefonica.com
>> > > >>>>    <mailto:alejandro.aguadomartin..ext@telefonica.com>>>;
>> Shwetha
>> > > >>>>    >     Bhandari (shwethab) <shwethab@cisco.com
>> > > >>>> <mailto:shwethab@cisco.com>
>> > > >>>>    <mailto:shwethab@cisco.com>
>> > > >>>>    >     <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com
>> >>>;
>> > > >>>>    Tal Mizrahi <tal.mizrahi.phd@gmail.com
>> > > >>>> <mailto:tal.mizrahi.phd@gmail.com>
>> > > >>>>    <mailto:tal.mizrahi.phd@gmail.com>
>> > > >>>>    >     <mailto:tal.mizrahi.phd@gmail.com
>> > > >>>>    <mailto:tal.mizrahi.phd@gmail.com>>>
>> > > >>>>    >     *Cc:* sfc@ietf.org <mailto:sfc@ietf.org> <mailto:
>> sfc@ietf.org>
>> > > >>>>    <mailto:sfc@ietf.org <mailto:sfc@ietf.org>>
>> > > >>>>    >     *Subject:* RE: PoT review/comments____
>> > > >>>>    >
>> > > >>>>    >     __ __
>> > > >>>>    >
>> > > >>>>    >     We=E2=80=99ve just posted revision -04 of
>> > > >>>>    draft-ietf-sfc-proof-of-transit
>> > > >>>>    >     which now includes support for OPOT configuration in t=
he
>> > > >>>>    yang model;____
>> > > >>>>    >
>> > > >>>>    >     see section 5.2.3 in
>> > > >>>>    >
>> https://www.ietf.org/id/draft-ietf-sfc-proof-of-transit-04.txt.
>> > > >>>> ____
>> > > >>>>    >
>> > > >>>>    >     The main addition is a grouping opot-profile, which ad=
ds
>> > > >>>>    upstream
>> > > >>>>    >     and downstream masks that OPOT requires.____
>> > > >>>>    >
>> > > >>>>    >     Thanks to Alejandro for suggesting these updates.____
>> > > >>>>    >
>> > > >>>>    >     __ __
>> > > >>>>    >
>> > > >>>>    >     This fixes the last =E2=80=9Cknown issue=E2=80=9D in
>> > > >>>>    >     draft-ietf-sfc-proof-of-transit. It would be great if
>> you
>> > > >>>>    could give
>> > > >>>>    >     the document another careful read through.
>> > > >>>>    >     Are we ready for WGLC?____
>> > > >>>>    >
>> > > >>>>    >     __ __
>> > > >>>>    >
>> > > >>>>    >     Thanks, Frank____
>> > > >>>>    >
>> > > >>>>    >     __ __
>> > > >>>>    >
>> > > >>>>    >     __ __
>> > > >>>>    >
>> > > >>>>    >     *From:* Alejandro Aguado FI <a.aguadom@fi.upm.es
>> > > >>>> <mailto:a.aguadom@fi.upm.es>
>> > > >>>>    <mailto:a..aguadom@fi.upm.es>
>> > > >>>>    >     <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.e=
s
>> >>>
>> > > >>>>    >     *Sent:* Donnerstag, 12. September 2019 15:40
>> > > >>>>    >     *To:* Diego R. Lopez <diego.r.lopez@telefonica.com
>> > > >>>> <mailto:diego.r.lopez@telefonica.com>
>> > > >>>>    <mailto:diego.r.lopez@telefonica.com>
>> > > >>>>    >     <mailto:diego.r.lopez@telefonica.com
>> > > >>>>    <mailto:diego.r.lopez@telefonica.com>>>; Carlos Pignataro
>> (cpignata)
>> > > >>>>    >     <cpignata@cisco.com <mailto:cpignata@cisco.com>
>> > > >>>> <mailto:cpignata@cisco.com>
>> > > >>>>    <mailto:cpignata@cisco.com <mailto:cpignata@cisco..com>>>;
>> Frank
>> > > >>>>    Brockners
>> > > >>>>    >     (fbrockne) <fbrockne@cisco.com <mailto:
>> fbrockne@cisco.com>
>> > > >>>> <mailto:fbrockne@cisco.com>
>> > > >>>>    <mailto:fbrockne@cisco.com <mailto:fbrockne@cisco.com>>>;
>> > > >>>>    >     ALEJANDRO AGUADO MARTIN
>> > > >>>>    <alejandro.aguadomartin.ext@telefonica.com
>> > > >>>> <mailto:alejandro.aguadomartin.ext@telefonica.com>
>> > > >>>>    <mailto:alejandro.aguadomartin.ext@telefonica.com>
>> > > >>>>    >     <mailto:alejandro.aguadomartin.ext@telefonica.com
>> > > >>>>    <mailto:alejandro.aguadomartin..ext@telefonica.com>>>;
>> Shwetha
>> > > >>>>    >     Bhandari (shwethab) <shwethab@cisco.com
>> > > >>>> <mailto:shwethab@cisco.com>
>> > > >>>>    <mailto:shwethab@cisco.com>
>> > > >>>>    >     <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com
>> >>>;
>> > > >>>>    Tal Mizrahi <tal.mizrahi.phd@gmail.com
>> > > >>>> <mailto:tal.mizrahi.phd@gmail.com>
>> > > >>>>    <mailto:tal.mizrahi.phd@gmail.com>
>> > > >>>>    >     <mailto:tal.mizrahi.phd@gmail.com
>> > > >>>>    <mailto:tal.mizrahi.phd@gmail.com>>>
>> > > >>>>    >     *Cc:* sfc@ietf.org <mailto:sfc@ietf.org> <mailto:
>> sfc@ietf.org>
>> > > >>>>    <mailto:sfc@ietf.org <mailto:sfc@ietf.org>>
>> > > >>>>    >     *Subject:* Re: PoT review/comments____
>> > > >>>>    >
>> > > >>>>    >     __ __
>> > > >>>>    >
>> > > >>>>    >     Hi Shwetha,____
>> > > >>>>    >
>> > > >>>>    >     __ __
>> > > >>>>    >
>> > > >>>>    >     Yes, I think it is a good idea. From your points, the
>> second
>> > > >>>>    one is
>> > > >>>>    >     a bit confusing to me... But I do not fully remember
>> how the
>> > > >>>>    model
>> > > >>>>    >     was structured, so I need to revise the document.____
>> > > >>>>    >
>> > > >>>>    >     __ __
>> > > >>>>    >
>> > > >>>>    >     Give me a day or two to explore again the model, and
>> either we
>> > > >>>>    >     exchange few emails with proposals for the extension,
>> or we can
>> > > >>>>    >     organise a quick call during next week to close a fina=
l
>> > > >>>>    proposal to
>> > > >>>>    >     share with other contributors.____
>> > > >>>>    >
>> > > >>>>    >     __ __
>> > > >>>>    >
>> > > >>>>    >     Thanks!____
>> > > >>>>    >
>> > > >>>>    >     __ __
>> > > >>>>    >
>> > > >>>>    >     Best,____
>> > > >>>>    >
>> > > >>>>    >     Alejandro____
>> > > >>>>    >
>> > > >>>>    >     __ __
>> > > >>>>    >
>> > > >>>>    >     __ __
>> > > >>>>    >
>> > > >>>>    >     El 12 de septiembre de 2019 a las 8:52:44, Shwetha
>> Bhandari
>> > > >>>>    >     (shwethab) (shwethab@cisco.com <mailto:
>> shwethab@cisco.com>
>> > > >>>> <mailto:shwethab@cisco.com>
>> > > >>>>    <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com>>)
>> > > >>>>    >     escribi=C3=B3:____
>> > > >>>>    >
>> > > >>>>    >     Hi Alejandro, Diego,____
>> > > >>>>    >
>> > > >>>>    >     ____
>> > > >>>>    >
>> > > >>>>    >     Since you added extension to do OPoT, should we extend
>> the
>> > > >>>>    model in
>> > > >>>>    >     draft-ietf-sfc-proof-of-transit to enable OPoT and any
>> > > >>>>    parameters
>> > > >>>>    >     required for it  shared masks per link. If yes my
>> proposal
>> > > >>>>    will be
>> > > >>>>    >     to:____
>> > > >>>>    >
>> > > >>>>    >      1. Augment existing pot-profile with fields to Enable
>> OPoT
>> > > >>>>    and a
>> > > >>>>    >         cipher scheme if needed.____
>> > > >>>>    >      2. Separate container in the model to define a map of
>> (Node
>> > > >>>>    >         link/interface, mask) to distribute pair wise
>> masks. For
>> > > >>>>    e.g.
>> > > >>>>    >         Node link/interface identifier can be UUID as
>> defined in
>> > > >>>>    rfc8348
>> > > >>>>    >         Or____
>> > > >>>>    >      3. Masks can be part of pot-profile.____
>> > > >>>>    >
>> > > >>>>    >     ____
>> > > >>>>    >
>> > > >>>>    >     What do you think about revising the model with
>> this?____
>> > > >>>>    >
>> > > >>>>    >     ____
>> > > >>>>    >
>> > > >>>>    >     Thanks,____
>> > > >>>>    >
>> > > >>>>    >     Shwetha____
>> > > >>>>    >
>> > > >>>>    >     ____
>> > > >>>>    >
>> > > >>>>    >     *From: *"Frank Brockners (fbrockne)" <
>> fbrockne@cisco.com
>> > > >>>> <mailto:fbrockne@cisco.com>
>> > > >>>>    <mailto:fbrockne@cisco.com>
>> > > >>>>    >     <mailto:fbrockne@cisco.com <mailto:fbrockne@cisco.com
>> >>>
>> > > >>>>    >     *Date: *Wednesday, September 11, 2019 at 2:34 PM
>> > > >>>>    >     *To: *ALEJANDRO AGUADO MARTIN
>> > > >>>>    >     <alejandro.aguadomartin.ext@telefonica.com
>> > > >>>> <mailto:alejandro.aguadomartin.ext@telefonica.com>
>> > > >>>>    <mailto:alejandro.aguadomartin.ext@telefonica.com>
>> > > >>>>    >     <mailto:alejandro.aguadomartin.ext@telefonica.com
>> > > >>>>    <mailto:alejandro.aguadomartin..ext@telefonica.com>>>,
>> "Diego R.
>> > > >>>>    >     Lopez" <diego.r.lopez@telefonica.com
>> > > >>>> <mailto:diego.r.lopez@telefonica.com>
>> > > >>>>    <mailto:diego.r.lopez@telefonica.com>
>> > > >>>>    >     <mailto:diego.r..lopez@telefonica.com
>> > > >>>>    <mailto:diego.r..lopez@telefonica.com>>>, Carlos Pignataro
>> > > >>>>    >     <cpignata@cisco..com <mailto:cpignata@cisco.com
>> > > >>>>    <mailto:cpignata@cisco.com>>>, Shwetha bhandari
>> > > >>>>    >     <shwethab@cisco.com <mailto:shwethab@cisco.com>
>> > > >>>> <mailto:shwethab@cisco.com>
>> > > >>>>    <mailto:shwethab@cisco.com <mailto:shwethab@cisco..com>>>,
>> Tal
>> > > >>>> Mizrahi
>> > > >>>>    >     <tal.mizrahi.phd@gmail.com <mailto:
>> tal.mizrahi.phd@gmail.com>
>> > > >>>>    <mailto:tal.mizrahi.phd@gmail.com>
>> > > >>>>    <mailto:tal.mizrahi.phd@gmail.com
>> > > >>>> <mailto:tal.mizrahi.phd@gmail.com>>>
>> > > >>>>    >     *Cc: *"a..aguadom@fi.upm.es <mailto:
>> a..aguadom@fi.upm.es>
>> > > >>>> <mailto:a..aguadom@fi.upm.es>
>> > > >>>>    <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>"
>> > > >>>>    >     <a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>
>> > > >>>> <mailto:a.aguadom@fi.upm.es>
>> > > >>>>    <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>>,
>> > > >>>>    "sfc@ietf.org <mailto:sfc@ietf.org> <mailto:sfc@ietf.org>
>> > > >>>>    >     <mailto:sfc@ietf.org <mailto:sfc@ietf.org>>" <
>> sfc@ietf.org
>> > > >>>> <mailto:sfc@ietf.org>
>> > > >>>>    <mailto:sfc@ietf.org> <mailto:sfc@ietf.org <mailto:
>> sfc@ietf.org>>>
>> > > >>>>    >     *Subject: *RE: PoT review/comments____
>> > > >>>>    >
>> > > >>>>    >     ____
>> > > >>>>    >
>> > > >>>>    >     Hi Alejandro,____
>> > > >>>>    >
>> > > >>>>    >     ____
>> > > >>>>    >
>> > > >>>>    >     Thanks again for the review. Your comments have been
>> > > >>>>    integrated into
>> > > >>>>    >     draft-ietf-sfc-proof-of-transit-03 which just got
>> posted.____
>> > > >>>>    >
>> > > >>>>    >     ____
>> > > >>>>    >
>> > > >>>>    >     Cheers, Frank____
>> > > >>>>    >
>> > > >>>>    >     ____
>> > > >>>>    >
>> > > >>>>    >     *From:*Frank Brockners (fbrockne)
>> > > >>>>    >     *Sent:* Montag, 27. Mai 2019 18:18
>> > > >>>>    >     *To:* ALEJANDRO AGUADO MARTIN
>> > > >>>>    >     <alejandro.aguadomartin.ext@telefonica.com
>> > > >>>> <mailto:alejandro.aguadomartin.ext@telefonica.com>
>> > > >>>>    <mailto:alejandro.aguadomartin.ext@telefonica.com>
>> > > >>>>    >     <mailto:alejandro.aguadomartin.ext@telefonica.com
>> > > >>>>    <mailto:alejandro.aguadomartin..ext@telefonica.com>>>; Diego
>> R. Lopez
>> > > >>>>    >     <diego.r.lopez@telefonica.com
>> > > >>>> <mailto:diego.r.lopez@telefonica.com>
>> > > >>>>    <mailto:diego.r.lopez@telefonica.com>
>> > > >>>>    >     <mailto:diego.r.lopez@telefonica.com
>> > > >>>>    <mailto:diego.r.lopez@telefonica.com>>>; Carlos Pignataro
>> (cpignata)
>> > > >>>>    >     <cpignata@cisco.com <mailto:cpignata@cisco.com>
>> > > >>>> <mailto:cpignata@cisco.com>
>> > > >>>>    <mailto:cpignata@cisco.com <mailto:cpignata@cisco..com>>>;
>> Shwetha
>> > > >>>>    Bhandari
>> > > >>>>    >     (shwethab) <shwethab@cisco.com <mailto:
>> shwethab@cisco.com>
>> > > >>>> <mailto:shwethab@cisco.com>
>> > > >>>>    <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com>>>; Ta=
l
>> > > >>>>    >     Mizrahi <tal.mizrahi.phd@gmail.com
>> > > >>>> <mailto:tal.mizrahi.phd@gmail.com>
>> > > >>>>    <mailto:tal.mizrahi.phd@gmail..com>
>> > > >>>>    <mailto:tal.mizrahi.phd@gmail.com
>> > > >>>> <mailto:tal.mizrahi.phd@gmail.com>>>
>> > > >>>>    >     *Cc:* a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>
>> > > >>>> <mailto:a.aguadom@fi.upm.es>
>> > > >>>>    <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>;
>> > > >>>> sfc@ietf.org <mailto:sfc@ietf.org> <mailto:sfc@ietf.org>
>> > > >>>>    >     <mailto:sfc@ietf.org <mailto:sfc@ietf.org>>
>> > > >>>>    >     *Subject:* RE: PoT review/comments____
>> > > >>>>    >
>> > > >>>>    >     ____
>> > > >>>>    >
>> > > >>>>    >     Hi Alejandro,____
>> > > >>>>    >
>> > > >>>>    >     ____
>> > > >>>>    >
>> > > >>>>    >     Many thanks for the comments =E2=80=93 and sorry for t=
he delay =E2=80=93
>> > > >>>>    >     unfortunately your email somehow got dropped from my
>> todo list.
>> > > >>>>    >     Please see inline=E2=80=A6____
>> > > >>>>    >
>> > > >>>>    >     ____
>> > > >>>>    >
>> > > >>>>    >     (cc=E2=80=99ing the list as well).____
>> > > >>>>    >
>> > > >>>>    >     ____
>> > > >>>>    >
>> > > >>>>    >     *From:*ALEJANDRO AGUADO MARTIN
>> > > >>>>    >     <alejandro.aguadomartin..ext@telefonica.com
>> > > >>>> <mailto:alejandro.aguadomartin..ext@telefonica.com>
>> > > >>>>    <mailto:alejandro.aguadomartin..ext@telefonica.com>
>> > > >>>>    >     <mailto:alejandro.aguadomartin.ext@telefonica.com
>> > > >>>>    <mailto:alejandro.aguadomartin..ext@telefonica.com>>>
>> > > >>>>    >     *Sent:* Montag, 15. April 2019 17:27
>> > > >>>>    >     *To:* Diego R. Lopez <diego.r.lopez@telefonica.com
>> > > >>>> <mailto:diego.r.lopez@telefonica.com>
>> > > >>>>    <mailto:diego.r.lopez@telefonica.com>
>> > > >>>>    >     <mailto:diego.r.lopez@telefonica.com
>> > > >>>>    <mailto:diego.r.lopez@telefonica.com>>>; Carlos Pignataro
>> (cpignata)
>> > > >>>>    >     <cpignata@cisco.com <mailto:cpignata@cisco.com>
>> > > >>>> <mailto:cpignata@cisco.com>
>> > > >>>>    <mailto:cpignata@cisco.com <mailto:cpignata@cisco..com>>>;
>> Frank
>> > > >>>>    Brockners
>> > > >>>>    >     (fbrockne) <fbrockne@cisco.com <mailto:
>> fbrockne@cisco.com>
>> > > >>>> <mailto:fbrockne@cisco.com>
>> > > >>>>    <mailto:fbrockne@cisco.com <mailto:fbrockne@cisco.com>>>;
>> Shwetha
>> > > >>>>    >     Bhandari (shwethab) <shwethab@cisco.com
>> > > >>>> <mailto:shwethab@cisco.com>
>> > > >>>>    <mailto:shwethab@cisco.com>
>> > > >>>>    >     <mailto:shwethab@cisco.com <mailto:shwethab@cisco.com
>> >>>;
>> > > >>>>    Tal Mizrahi <tal.mizrahi.phd@gmail.com
>> > > >>>> <mailto:tal.mizrahi.phd@gmail.com>
>> > > >>>>    <mailto:tal.mizrahi.phd@gmail.com>
>> > > >>>>    >     <mailto:tal.mizrahi.phd@gmail.com
>> > > >>>>    <mailto:tal.mizrahi.phd@gmail.com>>>
>> > > >>>>    >     *Cc:* a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>
>> > > >>>> <mailto:a.aguadom@fi.upm.es>
>> > > >>>>    <mailto:a.aguadom@fi.upm.es <mailto:a.aguadom@fi.upm.es>>
>> > > >>>>    >     *Subject:* PoT review/comments____
>> > > >>>>    >
>> > > >>>>    >     ____
>> > > >>>>    >
>> > > >>>>    >     Dear all,____
>> > > >>>>    >
>> > > >>>>    >     ____
>> > > >>>>    >
>> > > >>>>    >     I gave a quick review to the PoT document. Some
>> comments:____
>> > > >>>>    >
>> > > >>>>    >     ____
>> > > >>>>    >
>> > > >>>>    >     - I read =E2=80=9CThe non-constant coefficients are us=
ed to
>> > > >>>> generate the
>> > > >>>>    >     Lagrange Polynomial Constants (LPC).=E2=80=9D As far a=
s I
>> > > >>>>    understood, the
>> > > >>>>    >     points assigned to each node (Xi) are the ones used fo=
r
>> > > >>>>    generating
>> > > >>>>    >     the LPCi, aren=E2=80=99t they?____
>> > > >>>>    >
>> > > >>>>    >     */=E2=80=A6FB: Good catch. The LPCs are of course comp=
uted
>> using (x_i,
>> > > >>>>    >     y_i)./*____
>> > > >>>>    >
>> > > >>>>    >     - If we go for including the YANG in the current
>> document
>> > > >>>>    (which I
>> > > >>>>    >     agree), parameters should be described before the yang
>> > > >>>>    definition,
>> > > >>>>    >     and maybe it would be helpful to have the yang tree
>> (see the
>> > > >>>>    current
>> > > >>>>    >     version attached).____
>> > > >>>>    >
>> > > >>>>    >     */=E2=80=A6FB: Thanks. IMHO it makes sense to keep the=
 YANG
>> model
>> > > >>>> in the
>> > > >>>>    >     current doc, given that the model and the description
>> go
>> > > >>>> hand in
>> > > >>>>    >     hand. We can of course also include the yang tree to
>> make
>> > > >>>>    reading
>> > > >>>>    >     easier. This is consistent with other documents which
>> > > >>>>    specify YANG
>> > > >>>>    >     models./*____
>> > > >>>>    >
>> > > >>>>    >     - I include in the attached file few questions about
>> naming
>> > > >>>>    of some
>> > > >>>>    >     parameters.____
>> > > >>>>    >
>> > > >>>>    >     *//*____
>> > > >>>>    >
>> > > >>>>    >     */=E2=80=A6FB:
>> > > >>>>    >     - naming F_i(x_i, y_i) =E2=80=93 I agree that a better=
 name
>> could be
>> > > >>>>    used.
>> > > >>>>    >     The only potential concern would be that the open sour=
ce
>> > > >>>>    >     implementation in OpenDaylight uses this naming =E2=80=
=93
>> changing
>> > > >>>>    it might
>> > > >>>>    >     lead to confusion.. We can start with adding a comment
>> to make
>> > > >>>>    >     things clearer./*____
>> > > >>>>    >
>> > > >>>>    >     *//*____
>> > > >>>>    >
>> > > >>>>    >     */- secret key =E2=80=93 this is the constant part of =
the first
>> > > >>>>    polynomial
>> > > >>>>    >     which serves as the secret =E2=80=93 and which is re-r=
etrieved.
>> > > >>>>    Again, we
>> > > >>>>    >     can update the description to make things clearer./*__=
__
>> > > >>>>    >
>> > > >>>>    >     *//*____
>> > > >>>>    >
>> > > >>>>    >     */- size of the random number: This is unrelated to
>> OPOT.
>> > > >>>>    The random
>> > > >>>>    >     number is to uniquely identify a packet. There is a
>> trade-off
>> > > >>>>    >     between the size of the random number and how often yo=
u
>> need to
>> > > >>>>    >     re-key your system. At high speeds, the random number =
=E2=80=93
>> which
>> > > >>>>    >     identifies a particular packet =E2=80=93 is used up qu=
ite
>> quickly if
>> > > >>>>    it is
>> > > >>>>    >     only 32-bit wide. See section 4
>> > > >>>>    >
>> > > >>>>        /*
>> https://tools.ietf.org/html/draft-ietf-sfc-proof-of-transit-02#section-4=
____
>> > > >>>>    >
>> > > >>>>    >     *//*____
>> > > >>>>    >
>> > > >>>>    >     */- number of profiles: For a deployment which is
>> expected
>> > > >>>>    to renew
>> > > >>>>    >     keys every now and then (e.g. you run with 32-bit rand=
om
>> > > >>>>    numbers at
>> > > >>>>    >     reasonably high speeds), you need at least 2 profiles =
=E2=80=93
>> an
>> > > >>>>    active
>> > > >>>>    >     one and one that you can activate once you run out of
>> random
>> > > >>>>    numbers
>> > > >>>>    >     (which is what the encapsulating node would decide)..
>> /*____
>> > > >>>>    >
>> > > >>>>    >     - I have checked some of the existing YANG files withi=
n
>> the
>> > > >>>>    IETF to
>> > > >>>>    >     see in which it would be helpful to include. From the
>> (not
>> > > >>>>    so) old
>> > > >>>>    >     OpenFlow, I assume that one match is necessary (for
>> > > >>>> identify the
>> > > >>>>    >     iOAM/PoT header) whilst the source node can use any
>> existing
>> > > >>>>    match
>> > > >>>>    >     field to identify packets where to apply the PoT
>> scheme. In
>> > > >>>>    terms of
>> > > >>>>    >     actions, I would say that two may be required: for any
>> node, an
>> > > >>>>    >     update-pot is necessary, while the verifier would need=
 a
>> > > >>>>    verify-pot
>> > > >>>>    >     type of action, that would ideally either remove the
>> header
>> > > >>>>    or drop
>> > > >>>>    >     the packet if fails (I do not know if you are thinking
>> in more
>> > > >>>>    >     complex scenarios).____
>> > > >>>>    >
>> > > >>>>    >     *//*____
>> > > >>>>    >
>> > > >>>>    >     */=E2=80=A6FB: From an OF perspective, that sounds fea=
sible..
>> That
>> > > >>>>    said, we
>> > > >>>>    >     probably want to avoid making the spec specific to a
>> > > >>>>    technology like
>> > > >>>>    >     OF, hence would suggest that we don=E2=80=99t specify =
such a
>> > > >>>> behavior as
>> > > >>>>    >     part of this document./*____
>> > > >>>>    >
>> > > >>>>    >     *//*____
>> > > >>>>    >
>> > > >>>>    >     - For this last point, I have seen the definitions
>> within
>> > > >>>>    >     draft-asechoud-rtgwg-qos-model-08, where matched could
>> map
>> > > >>>>    (if I am
>> > > >>>>    >     not wrong) to classifiers/filters, and actions to
>> actions. I
>> > > >>>>    send
>> > > >>>>    >     you the models in a zip file. In this sense the model
>> to be
>> > > >>>>    defined
>> > > >>>>    >     in the PoT shall be an augment of the models defined i=
n
>> that
>> > > >>>>    >     document. I have not done a very deep revision on the
>> model,
>> > > >>>>    but I
>> > > >>>>    >     think it could fit there. If you have check this or
>> other
>> > > >>>>    models,
>> > > >>>>    >     let me know so I could also help.____
>> > > >>>>    >
>> > > >>>>    >     *//*____
>> > > >>>>    >
>> > > >>>>    >     */=E2=80=A6FB: Per my note above: In order to keep POT=
 generic
>> and
>> > > >>>>    not link
>> > > >>>>    >     it to a particular classification mechanism, I=E2=80=
=99d prefer
>> to
>> > > >>>>    keep the
>> > > >>>>    >     classification question as out of scope for the curren=
t
>> > > >>>>    document.
>> > > >>>>    >     That way it can also apply to technologies which come
>> with
>> > > >>>>    their own
>> > > >>>>    >     way to classify =E2=80=93 and which might fully decoup=
le the
>> tunneling
>> > > >>>>    >     aspects from the classification aspects. /*____
>> > > >>>>    >
>> > > >>>>    >     ____
>> > > >>>>    >
>> > > >>>>    >     Thanks a lot and sorry for such long email.____
>> > > >>>>    >
>> > > >>>>    >     ____
>> > > >>>>    >
>> > > >>>>    >     */..FB: Thanks again for all your comments. We=E2=80=
=99ll get
>> them
>> > > >>>>    included
>> > > >>>>    >     in the next revision. /*____
>> > > >>>>    >
>> > > >>>>    >     *//*____
>> > > >>>>    >
>> > > >>>>    >     */Cheers, Frank/*____
>> > > >>>>    >
>> > > >>>>    >     ____
>> > > >>>>    >
>> > > >>>>    >     ____
>> > > >>>>    >
>> > > >>>>    >     ____
>> > > >>>>    >
>> > > >>>>    >     Best,____
>> > > >>>>    >
>> > > >>>>    >     Alejandro____
>> > > >>>>    >
>> > > >>>>    >     ____
>> > > >>>>    >
>> > > >>>>    >     ____
>> > > >>>>    >
>> > > >>>>    >     ____
>> > > >>>>    >
>> > > >>>>    >     ____
>> > > >>>>    >
>> > > >>>>    >
>> > > >>>>
>> ------------------------------------------------------------------------
>> > > >>>>    >
>> > > >>>>    >
>> > > >>>>    >     Este mensaje y sus adjuntos se dirigen exclusivamente =
a
>> su
>> > > >>>>    >     destinatario, puede contener informaci=C3=B3n privileg=
iada o
>> > > >>>>    confidencial
>> > > >>>>    >     y es para uso exclusivo de la persona o entidad de
>> destino.
>> > > >>>>    Si no es
>> > > >>>>    >     usted. el destinatario indicado, queda notificado de
>> que la
>> > > >>>>    lectura,
>> > > >>>>    >     utilizaci=C3=B3n, divulgaci=C3=B3n y/o copia sin autor=
izaci=C3=B3n
>> puede estar
>> > > >>>>    >     prohibida en virtud de la legislaci=C3=B3n vigente. Si=
 ha
>> > > >>>>    recibido este
>> > > >>>>    >     mensaje por error, le rogamos que nos lo comunique
>> > > >>>>    inmediatamente
>> > > >>>>    >     por esta misma v=C3=ADa y proceda a su destrucci=C3=B3=
n.
>> > > >>>>    >
>> > > >>>>    >     The information contained in this transmission is
>> > > >>>> privileged and
>> > > >>>>    >     confidential information intended only for the use of
>> the
>> > > >>>>    individual
>> > > >>>>    >     or entity named above. If the reader of this message i=
s
>> not the
>> > > >>>>    >     intended recipient, you are hereby notified that any
>> > > >>>>    dissemination,
>> > > >>>>    >     distribution or copying of this communication is
>> strictly
>> > > >>>>    >     prohibited. If you have received this transmission in
>> error,
>> > > >>>>    do not
>> > > >>>>    >     read it. Please immediately reply to the sender that
>> you have
>> > > >>>>    >     received this communication in error and then delete i=
t.
>> > > >>>>    >
>> > > >>>>    >     Esta mensagem e seus anexos se dirigem exclusivamente
>> ao seu
>> > > >>>>    >     destinat=C3=A1rio, pode conter informa=C3=A7=C3=A3o pr=
ivilegiada ou
>> > > >>>>    confidencial e
>> > > >>>>    >     =C3=A9 para uso exclusivo da pessoa ou entidade de des=
tino.
>> Se n=C3=A3o =C3=A9
>> > > >>>>    >     vossa senhoria o destinat=C3=A1rio indicado, fica noti=
ficado
>> de
>> > > >>>> que a
>> > > >>>>    >     leitura, utiliza=C3=A7=C3=A3o, divulga=C3=A7=C3=A3o e/=
ou c=C3=B3pia sem
>> autoriza=C3=A7=C3=A3o pode
>> > > >>>>    >     estar proibida em virtude da legisla=C3=A7=C3=A3o vige=
nte. Se
>> recebeu
>> > > >>>> esta
>> > > >>>>    >     mensagem por erro, rogamos-lhe que nos o comunique
>> > > >>>>    imediatamente por
>> > > >>>>    >     esta mesma via e proceda a sua destrui=C3=A7=C3=A3o___=
_
>> > > >>>>    >
>> > > >>>>    >     _______________________________________________
>> > > >>>>    >     sfc mailing list
>> > > >>>>    > sfc@ietf.org <mailto:sfc@ietf.org> <mailto:sfc@ietf.org>
>> > > >>>> <mailto:sfc@ietf.org
>> > > >>>>    <mailto:sfc@ietf.org>>
>> > > >>>>    > https://www.ietf.org/mailman/listinfo/sfc
>> > > >>>>    >
>> > > >>>>    >
>> > > >>>>    > _______________________________________________
>> > > >>>>    > sfc mailing list
>> > > >>>>    > sfc@ietf.org <mailto:sfc@ietf.org> <mailto:sfc@ietf.org>
>> > > >>>>    > https://www.ietf.org/mailman/listinfo/sfc
>> > > >>>>    >
>> > > >>>>
>> > > >>>> _______________________________________________
>> > > >>>> sfc mailing list
>> > > >>>> sfc@ietf.org <mailto:sfc@ietf.org> <mailto:sfc@ietf.org>
>> > > >>>> https://www.ietf.org/mailman/listinfo/sfc
>> > > >
>> > >
>> > > _______________________________________________
>> > > sfc mailing list
>> > > sfc@ietf.org
>> > > https://www.ietf.org/mailman/listinfo/sfc
>> >
>>
>>
>

--000000000000e4a5f105a24375d0
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Carlos,<div>after reading Joel&#39;s conditional MUST I&#3=
9;ve reconsidered my position. I agree with the text he proposed.</div><div=
><br></div><div>Regards,</div><div>Greg</div></div><br><div class=3D"gmail_=
quote"><div dir=3D"ltr" class=3D"gmail_attr">On Wed, Apr 1, 2020 at 4:47 PM=
 Carlos Pignataro (cpignata) &lt;<a href=3D"mailto:cpignata@cisco.com">cpig=
nata@cisco.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" st=
yle=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padd=
ing-left:1ex">



<div style=3D"overflow-wrap: break-word;">
Greg,
<div><br>
</div>
<div>I understood Joel=E2=80=99s reasoning to be different than yours, and =
different his position also (I understood Joel to be OK either way with a p=
reference for Normative, and later he gave a suggestion of a conditional MU=
ST, while your position seemed
 to me an absolute MUST, more terminal and inflexible).</div>
<div><br>
</div>
<div>For completeness, this was the question I asked you, under the context=
 of the IESG note in [1] below:</div>
<div><br>
</div>
<div>
<blockquote type=3D"cite">
<div class=3D"gmail_quote">
<blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-=
left:1px solid rgb(204,204,204);padding-left:1ex">
Is the technology in draft-ietf-sfc-ioam-nsh a =E2=80=9Cmust=E2=80=9D for d=
raft-ietf-sfc-proof-of-transit?</blockquote>
</div>
</blockquote>
</div>
<div><br>
</div>
<div>What do you think?</div>
<div><br>
</div>
<div>Best,</div>
<div><br>
</div>
<div>Carlos.</div>
<div><br>
<div><br>
<blockquote type=3D"cite">
<div>2020/04/01 =E5=8D=88=E5=BE=8C7:28=E3=80=81Greg Mirsky &lt;<a href=3D"m=
ailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.com</a>&gt=
;=E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:</div>
<br>
<div>
<div dir=3D"ltr">Dear Carlos,
<div>I believe that Joel has expressed it clearly and I concur with his rea=
soning.</div>
<div><br>
</div>
<div>Regards,</div>
<div>Greg</div>
</div>
<br>
<div class=3D"gmail_quote">
<div dir=3D"ltr" class=3D"gmail_attr">On Wed, Apr 1, 2020 at 4:13 PM Carlos=
 Pignataro (cpignata) &lt;<a href=3D"mailto:cpignata@cisco.com" target=3D"_=
blank">cpignata@cisco.com</a>&gt; wrote:<br>
</div>
<blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-=
left:1px solid rgb(204,204,204);padding-left:1ex">
Dear Greg,<br>
<br>
This seems to be a rephrase of the previous email, yet I still do not follo=
w the cause-effect in your argument.<br>
<br>
Normative does not mean =E2=80=9Ca reference that defines technology within=
 the same Working Group=E2=80=99s documents that can be used=E2=80=9D.<br>
<br>
The definition and clarification statement at [1] says =E2=80=9Cdocuments t=
hat must be read to understand or implement the technology in the new RFC=
=E2=80=9D. It does not speak to WG charters or.<br>
<br>
Is the technology in draft-ietf-sfc-ioam-nsh a =E2=80=9Cmust=E2=80=9D for d=
raft-ietf-sfc-proof-of-transit? It seems to me that the only =E2=80=9Cmust=
=E2=80=9D technology is ippm-ioam-data. I appreciate that this is also not =
necessarily a yes/no binary answer...<br>
<br>
[Again, I am OK either way, for the right reason]<br>
<br>
Carlos.<br>
<br>
[1] <a href=3D"https://www.ietf.org/about/groups/iesg/statements/normative-=
informative-references/" rel=3D"noreferrer" target=3D"_blank">
https://www.ietf.org/about/groups/iesg/statements/normative-informative-ref=
erences/</a><br>
<br>
<br>
&gt; 2020/04/01 =E5=8D=88=E5=BE=8C3:36=E3=80=81Greg Mirsky &lt;<a href=3D"m=
ailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.com</a>&gt=
;=E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:<br>
&gt; <br>
&gt; Dear Carlos,<br>
&gt; in my previous note I have recognized that POT, as SFC, can be realize=
d using different techniques. But this is SFC WG document and, as I underst=
and the charter of SFC WG, we&#39;re defining technologies that use SFC NSH=
. Hence my conclusion that the reference
 to draft-ietf-sfc-ioam-nsh should be normative, as that is the only docume=
nt that defines iOAM encapsulation in NSH. Making the reference information=
al could be interpreted as suggestion that POT in SFC NSH might be encapsul=
ated not as iOAM but in some other
 manner. And while that is possible, I don&#39;t see a proposal that descri=
bes such alternative encapsulation. So, it appears that the WG has agreed t=
hat POT in SFC NSH should use encapsulation as defined in draft-ietf-sfc-io=
am-nsh.
<br>
&gt; <br>
&gt; Regards,<br>
&gt; Greg<br>
&gt; <br>
&gt; On Wed, Apr 1, 2020 at 12:16 PM Carlos Pignataro (cpignata) &lt;<a hre=
f=3D"mailto:cpignata@cisco.com" target=3D"_blank">cpignata@cisco.com</a>&gt=
; wrote:<br>
&gt; Dear Greg,<br>
&gt; <br>
&gt; &gt; 2020/04/01 =E5=8D=88=E5=BE=8C2:59=E3=80=81Greg Mirsky &lt;<a href=
=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.com</=
a>&gt;=E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:<br>
&gt; &gt; <br>
&gt; &gt; Dear All,<br>
&gt; &gt; I agree with Joel that the reference in draft-ietf-sfc-proof-of-t=
ransit to draft-ietf-ippm-ioam-data should be normative.<br>
&gt; <br>
&gt; Great. Everyone seems to be aligned on this point.<br>
&gt; <br>
&gt; <br>
&gt; &gt; I also support the proposal to add in draft-ietf-sfc-proof-of-tra=
nsit a normative reference to draft-ietf-sfc-ioam-nsh. SFC WG is working on=
 defining SFC that is based on NSH (SFC NSH), and while SFC might be realiz=
ed using other techniques, draft-ietf-sfc-ioam-nsh
 is, and likely will remain, the only document that is describing iOAM enca=
psulation in SFC NSH. Thus, I believe, for SFC WG, implementation of PoT ba=
sed on iOAM requires implementation of iOAM encapsulation in SFC NSH, as de=
fined in draft-ietf-sfc-ioam-nsh.
 Hence, the reference must be normative.<br>
&gt; <br>
&gt; <br>
&gt; This logic is flawed in the onset. The main point is that POT can be r=
ealized with a variety of transports and technologies and use-cases, one of=
 which is SFC, and then further within SFC one of which is NSH.
<br>
&gt; <br>
&gt; You seem to argue that NSH is somehow in practice the only SFC realiza=
tion, and because of that the reference =E2=80=9Cmust be normative=E2=80=9D=
.<br>
&gt; <br>
&gt; I disagree with the premise, but regardless, it does not matter since =
POT applies to other non-SFC(-non-NSH) technologies. Therefore that since-t=
hen logic does not apply.<br>
&gt; <br>
&gt; Copying the very first sentence of the Abstract:<br>
&gt; <br>
&gt;=C2=A0 =C2=A0 Several technologies such as Traffic Engineering (TE), Se=
rvice<br>
&gt;=C2=A0 =C2=A0 Function Chaining (SFC), and policy based routing [...]<b=
r>
&gt; <br>
&gt; <br>
&gt; And now looking at this fragment, I am more convinced that this is one=
 example and as such Informative.
<br>
&gt; <br>
&gt; I would not object to Normative for the right reasons, but the reason =
above, in my mind, does not follow.<br>
&gt; <br>
&gt; Thanks,<br>
&gt; <br>
&gt; Carlos.<br>
&gt; <br>
&gt; <br>
&gt; &gt; <br>
&gt; &gt; Regards,<br>
&gt; &gt; Greg<br>
&gt; &gt; <br>
&gt; &gt; On Tue, Mar 24, 2020 at 2:25 PM Joel M. Halpern &lt;<a href=3D"ma=
ilto:jmh@joelhalpern.com" target=3D"_blank">jmh@joelhalpern.com</a>&gt; wro=
te:<br>
&gt; &gt; I think we all agree that draft-ietf-sfc-proof-of-transit require=
s the <br>
&gt; &gt; normative reference to draft-ietf-ippm-ioam-data.<br>
&gt; &gt; <br>
&gt; &gt; Regarding a reference from draft-ietf-sfc-proof-of-transit to <br=
>
&gt; &gt; draft-ietf-sfc-ioam-nsh, I think we agree that it is needed.=C2=
=A0 The <br>
&gt; &gt; question then is normative or informative.=C2=A0 If we use the us=
ual IETF <br>
&gt; &gt; rule that there has to be a defined normative way to interoperabl=
y <br>
&gt; &gt; implement a protocol spec (with other options allowed), my inclin=
ation <br>
&gt; &gt; is that the reference should be normative.<br>
&gt; &gt; <br>
&gt; &gt; Regarding the informative reference in the other direction from <=
br>
&gt; &gt; draft-ietf-sfc-ioam-nsh to draft-ietf-sfc-proof-of-transit, while=
 I <br>
&gt; &gt; personally like the idea, that is up to you / the working group.<=
br>
&gt; &gt; <br>
&gt; &gt; Yours,<br>
&gt; &gt; Joel<br>
&gt; &gt; <br>
&gt; &gt; On 3/24/2020 5:20 PM, Carlos Pignataro (cpignata) wrote:<br>
&gt; &gt; &gt; Hi, Joel,<br>
&gt; &gt; &gt; <br>
&gt; &gt; &gt; The way in which the doc hierarchy and relationship is struc=
ture seems <br>
&gt; &gt; &gt; to support and potentially even require:<br>
&gt; &gt; &gt; <br>
&gt; &gt; &gt; From draft-ietf-sfc-proof-of-transit:<br>
&gt; &gt; &gt; * A normative reference to [I-D.ietf-ippm-ioam-data], since =
PoT gives <br>
&gt; &gt; &gt; over IOAM explicitly, and that exists.<br>
&gt; &gt; &gt; * Optionally, an Informative reference to draft-ietf-sfc-ioa=
m-nsh, since <br>
&gt; &gt; &gt; that=E2=80=99s really one out of many ways to carry IOAM ove=
r NSH, but separated <br>
&gt; &gt; &gt; by document indirection. This does not exist but can be adde=
d.<br>
&gt; &gt; &gt; <br>
&gt; &gt; &gt;=C2=A0 From draft-ietf-sfc-ioam-nsh:<br>
&gt; &gt; &gt; * Optionally, an Informative reference to <br>
&gt; &gt; &gt; draft-ietf-sfc-proof-of-transit, since that=E2=80=99s one ou=
t of many <br>
&gt; &gt; &gt; applications. This does not exist but can be added.<br>
&gt; &gt; &gt; <br>
&gt; &gt; &gt; Thoughts?<br>
&gt; &gt; &gt; <br>
&gt; &gt; &gt; Best,<br>
&gt; &gt; &gt; <br>
&gt; &gt; &gt; Carlos.<br>
&gt; &gt; &gt; <br>
&gt; &gt; &gt;&gt; 2020/03/24 =E5=8D=88=E5=BE=8C5:10=E3=80=81Joel M. Halper=
n &lt;<a href=3D"mailto:jmh@joelhalpern.com" target=3D"_blank">jmh@joelhalp=
ern.com</a>
<br>
&gt; &gt; &gt;&gt; &lt;mailto:<a href=3D"mailto:jmh@joelhalpern.com" target=
=3D"_blank">jmh@joelhalpern.com</a>&gt;&gt;=E3=81=AE=E3=83=A1=E3=83=BC=E3=
=83=AB:<br>
&gt; &gt; &gt;&gt;<br>
&gt; &gt; &gt;&gt; Carlos, it sounds like there should probably be a normat=
ive reference <br>
&gt; &gt; &gt;&gt; from draft-ietf-sfc-proof of transit to draft-ietf-sfc-i=
oam-nsh? <br>
&gt; &gt; &gt;&gt; Possibly in the same sentence that refers to draft-ietf-=
ippm-ioam-data?<br>
&gt; &gt; &gt;&gt;<br>
&gt; &gt; &gt;&gt; Yours,<br>
&gt; &gt; &gt;&gt; Joel<br>
&gt; &gt; &gt;&gt;<br>
&gt; &gt; &gt;&gt; On 3/24/2020 4:54 PM, Carlos Pignataro (cpignata) wrote:=
<br>
&gt; &gt; &gt;&gt;&gt; Greg,<br>
&gt; &gt; &gt;&gt;&gt; The very first sentence of the PoT document reads:<b=
r>
&gt; &gt; &gt;&gt;&gt;=C2=A0 =C2=A0 Several technologies such as Traffic En=
gineering (TE), Service<br>
&gt; &gt; &gt;&gt;&gt;=C2=A0 =C2=A0 Function Chaining (SFC), and policy bas=
ed routing are used to steer<br>
&gt; &gt; &gt;&gt;&gt;=C2=A0 =C2=A0 traffic through a specific, user-define=
d path.=C2=A0 This document defines<br>
&gt; &gt; &gt;&gt;&gt; Explaining how this document is applicable to variou=
s <br>
&gt; &gt; &gt;&gt;&gt; traffic-steering technologies.<br>
&gt; &gt; &gt;&gt;&gt; Section 3 then explains:<br>
&gt; &gt; &gt;&gt;&gt;=C2=A0 =C2=A0 The POT information is encapsulated in =
packets as an IOAM Proof Of<br>
&gt; &gt; &gt;&gt;&gt;=C2=A0 =C2=A0 Transit Option.=C2=A0 The details and f=
ormat of the encapsulation and the<br>
&gt; &gt; &gt;&gt;&gt;=C2=A0 =C2=A0 POT Option format are specified in [I-D=
.ietf-ippm-ioam-data].<br>
&gt; &gt; &gt;&gt;&gt; Which shows how to carry PoT in IOAM, with an approp=
riate pointer.<br>
&gt; &gt; &gt;&gt;&gt; Lastly, draft-ietf-sfc-ioam-nsh-03 defines IOAM over=
 an NSH <br>
&gt; &gt; &gt;&gt;&gt; encapsulation.<br>
&gt; &gt; &gt;&gt;&gt; This arrangements maximizes specification modularity=
 and <br>
&gt; &gt; &gt;&gt;&gt; portability/reusability.<br>
&gt; &gt; &gt;&gt;&gt; Best,<br>
&gt; &gt; &gt;&gt;&gt; Carlos.<br>
&gt; &gt; &gt;&gt;&gt;&gt; 2020/03/24 =E5=8D=88=E5=BE=8C4:48=E3=80=81Greg M=
irsky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregim=
irsky@gmail.com</a>
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:gregimirsky@gmail.c=
om" target=3D"_blank">gregimirsky@gmail.com</a>&gt; &lt;mailto:<a href=3D"m=
ailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.com</a>&gt=
;&gt;=E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:<br>
&gt; &gt; &gt;&gt;&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt; Hi Joel,<br>
&gt; &gt; &gt;&gt;&gt;&gt; thank you for the most expedient response. As I =
understand it, iOAM <br>
&gt; &gt; &gt;&gt;&gt;&gt; Data draft describes the format of the informati=
onal element that <br>
&gt; &gt; &gt;&gt;&gt;&gt; carries POT-related information but it does not =
define how the <br>
&gt; &gt; &gt;&gt;&gt;&gt; element to be carried in case of NSH encapsulati=
on. And that is what <br>
&gt; &gt; &gt;&gt;&gt;&gt; I was asking, apologies for not being clear in m=
y first note.<br>
&gt; &gt; &gt;&gt;&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt; Regards,<br>
&gt; &gt; &gt;&gt;&gt;&gt; Greg<br>
&gt; &gt; &gt;&gt;&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt; On Tue, Mar 24, 2020 at 1:42 PM Joel M.. Halpern=
 <br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;<a href=3D"mailto:jmh@joelhalpern.com" targe=
t=3D"_blank">jmh@joelhalpern.com</a> &lt;mailto:<a href=3D"mailto:jmh@joelh=
alpern.com" target=3D"_blank">jmh@joelhalpern.com</a>&gt;
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:jmh@joelhalpern.com=
" target=3D"_blank">jmh@joelhalpern.com</a>&gt;&gt; wrote:<br>
&gt; &gt; &gt;&gt;&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Regarding the information carriage,=
 the PoT document points to the<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 IOAM<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 document.<br>
&gt; &gt; &gt;&gt;&gt;&gt; <a href=3D"https://tools.ietf.org/html/draft-iet=
f-ippm-ioam-data-08#section-4.5" rel=3D"noreferrer" target=3D"_blank">
https://tools.ietf.org/html/draft-ietf-ippm-ioam-data-08#section-4.5</a><br=
>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 gives the format (and ways to have =
other formats if needed.)<br>
&gt; &gt; &gt;&gt;&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Yours,<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Joel<br>
&gt; &gt; &gt;&gt;&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 On 3/24/2020 4:26 PM, Greg Mirsky w=
rote:<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; Hi Frank,<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; thank you for reminding us abo=
ut this important work, indeed we<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 should<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; complete it. I&#39;ve reviewed=
 the draft and have several questions.<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Please<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; kindly consider:<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0* I couldn&#39;t f=
ind information where, relative to NSH, RND and<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 CML are<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0transported=
<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0* for YANG data mo=
dels using &quot;reference&quot; is strongly<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 encouraged as it<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0provides a =
pointer to the specification. Since the POT data<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 model is<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0in the same=
 document as the POT specification, listing the<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0appropriate=
 section should suffice<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; Regards,<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; Greg<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; On Thu, Mar 19, 2020 at 6:45 A=
M Frank Brockners (fbrockne)<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; &lt;fbrockne=3D<a href=3D"mail=
to:40cisco.com@dmarc.ietf.org" target=3D"_blank">40cisco.com@dmarc.ietf.org=
</a>
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:fbrockne" target=3D=
"_blank">fbrockne</a>=3D<a href=3D"mailto:40cisco.com@dmarc.ietf.org" targe=
t=3D"_blank">40cisco.com@dmarc.ietf.org</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:40cisc=
o.com@dmarc.ietf.org" target=3D"_blank">40cisco.com@dmarc.ietf.org</a>&gt;<=
br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; &lt;mailto:<a href=3D"mailto:4=
0cisco.com@dmarc.ietf.org" target=3D"_blank">40cisco.com@dmarc.ietf.org</a>=
<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:40cisc=
o.com@dmarc.ietf.org" target=3D"_blank">40cisco.com@dmarc.ietf.org</a>&gt;&=
gt;&gt; wrote:<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Dear SFC WG=
,____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0It=E2=80=99=
s been a while since we posted<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 draft-ietf-sfc-proof-of-transit-04<=
br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0which addre=
ssed all known comments =E2=80=93 see below.<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0I=E2=80=99v=
e not seen any more recent comments or questions come up<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 =E2=80=93 and<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0we=E2=80=99=
ve been through quite a few discussions and reviews of this<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0document al=
ready.____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Thus the qu=
estion: Are we ready for WG LC?____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Thanks, Fra=
nk____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*From:* Fra=
nk Brockners (fbrockne)<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Sent:* Don=
nerstag, 21. November 2019 08:21<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*To:* Aleja=
ndro Aguado FI &lt;<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank"=
>a.aguadom@fi.upm.es</a>
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es=
" target=3D"_blank">a.aguadom@fi.upm.es</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:a.agua=
dom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.e=
s</a> &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a=
.aguadom@fi.upm.es</a>&gt;&gt;&gt;;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Diego R. Lopez<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=
=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@te=
lefonica.com</a>
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:diego.r.lopez@telef=
onica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.=
r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&=
gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_blank">diego.r.l=
opez@telefonica.com</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.=
r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&=
gt;&gt;&gt;; Carlos Pignataro (cpignata)<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=
=3D"mailto:cpignata@cisco.com" target=3D"_blank">cpignata@cisco.com</a> &lt=
;mailto:<a href=3D"mailto:cpignata@cisco.com" target=3D"_blank">cpignata@ci=
sco.com</a>&gt;
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:cpignata@cisco.com"=
 target=3D"_blank">cpignata@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:cpigna=
ta@cisco.com" target=3D"_blank">cpignata@cisco.com</a> &lt;mailto:<a href=
=3D"mailto:cpignata@cisco." target=3D"_blank">cpignata@cisco.</a>.com&gt;&g=
t;&gt;;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 ALEJANDRO AGUADO<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0MARTIN &lt;=
<a href=3D"mailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_bla=
nk">alejandro.aguadomartin.ext@telefonica.com</a>
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:alejandro.aguadomar=
tin.ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin.ext@telefo=
nica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejan=
dro.aguadomartin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomar=
tin..ext@telefonica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_bla=
nk">alejandro.aguadomartin.ext@telefonica.com</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejan=
dro.aguadomartin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomar=
tin..ext@telefonica.com</a>&gt;&gt;&gt;; Shwetha<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Bhandari (s=
hwethab) &lt;<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shweth=
ab@cisco.com</a>
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:shwethab@cisco.com"=
 target=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:shweth=
ab@cisco.com" target=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com<=
/a> &lt;mailto:<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwe=
thab@cisco.com</a>&gt;&gt;&gt;;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Tal Mizrahi &lt;<a href=3D"mailto:t=
al.mizrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:tal.mizrahi.phd@gma=
il.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mi=
zrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br=
>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:tal.mizrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.=
phd@gmail.com</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mi=
zrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;&gt=
;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Cc:* <a hr=
ef=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a=
 href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt; &lt;ma=
ilto:<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt;=
<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:sfc@ie=
tf.org" target=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a href=3D"mailto:sfc=
@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Subject:* =
RE: PoT review/comments____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0We=E2=80=99=
ve just posted revision -04 of<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 draft-ietf-sfc-proof-of-transit<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0which now i=
ncludes support for OPOT configuration in the<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 yang model;____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0see section=
 5.2.3 in<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; <a href=3D"https://www.ietf.or=
g/id/draft-ietf-sfc-proof-of-transit-04.txt" rel=3D"noreferrer" target=3D"_=
blank">
https://www.ietf.org/id/draft-ietf-sfc-proof-of-transit-04.txt</a>. <br>
&gt; &gt; &gt;&gt;&gt;&gt; ____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0The main ad=
dition is a grouping opot-profile, which adds<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 upstream<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0and downstr=
eam masks that OPOT requires.____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Thanks to A=
lejandro for suggesting these updates.____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0This fixes =
the last =E2=80=9Cknown issue=E2=80=9D in<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0draft-ietf-=
sfc-proof-of-transit. It would be great if you<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 could give<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0the documen=
t another careful read through.<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Are we read=
y for WGLC?____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Thanks, Fra=
nk____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*From:* Ale=
jandro Aguado FI &lt;<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blan=
k">a.aguadom@fi.upm.es</a>
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es=
" target=3D"_blank">a.aguadom@fi.upm.es</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:a..agu=
adom@fi.upm.es" target=3D"_blank">a..aguadom@fi.upm.es</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.e=
s</a> &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a=
.aguadom@fi.upm.es</a>&gt;&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Sent:* Don=
nerstag, 12. September 2019 15:40<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*To:* Diego=
 R. Lopez &lt;<a href=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_bl=
ank">diego.r.lopez@telefonica.com</a>
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:diego.r.lopez@telef=
onica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.=
r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&=
gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_blank">diego.r.l=
opez@telefonica.com</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.=
r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&=
gt;&gt;&gt;; Carlos Pignataro (cpignata)<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=
=3D"mailto:cpignata@cisco.com" target=3D"_blank">cpignata@cisco.com</a> &lt=
;mailto:<a href=3D"mailto:cpignata@cisco.com" target=3D"_blank">cpignata@ci=
sco.com</a>&gt;
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:cpignata@cisco.com"=
 target=3D"_blank">cpignata@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:cpigna=
ta@cisco.com" target=3D"_blank">cpignata@cisco.com</a> &lt;mailto:<a href=
=3D"mailto:cpignata@cisco." target=3D"_blank">cpignata@cisco.</a>.com&gt;&g=
t;&gt;; Frank<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Brockners<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0(fbrockne) =
&lt;<a href=3D"mailto:fbrockne@cisco.com" target=3D"_blank">fbrockne@cisco.=
com</a> &lt;mailto:<a href=3D"mailto:fbrockne@cisco.com" target=3D"_blank">=
fbrockne@cisco.com</a>&gt;
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:fbrockne@cisco.com"=
 target=3D"_blank">fbrockne@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:fbrock=
ne@cisco.com" target=3D"_blank">fbrockne@cisco.com</a> &lt;mailto:<a href=
=3D"mailto:fbrockne@cisco.com" target=3D"_blank">fbrockne@cisco.com</a>&gt;=
&gt;&gt;;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0ALEJANDRO A=
GUADO MARTIN<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;<a href=3D"mailto:alejandro.agu=
adomartin.ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin.ext@=
telefonica.com</a>
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:alejandro.aguadomar=
tin.ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin.ext@telefo=
nica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejan=
dro.aguadomartin.ext@telefonica.com" target=3D"_blank">alejandro.aguadomart=
in.ext@telefonica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_bla=
nk">alejandro.aguadomartin.ext@telefonica.com</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejan=
dro.aguadomartin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomar=
tin..ext@telefonica.com</a>&gt;&gt;&gt;; Shwetha<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Bhandari (s=
hwethab) &lt;<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shweth=
ab@cisco.com</a>
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:shwethab@cisco.com"=
 target=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:shweth=
ab@cisco.com" target=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com<=
/a> &lt;mailto:<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwe=
thab@cisco.com</a>&gt;&gt;&gt;;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Tal Mizrahi &lt;<a href=3D"mailto:t=
al.mizrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:tal.mizrahi.phd@gma=
il.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mi=
zrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br=
>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:tal.mizrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.=
phd@gmail.com</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mi=
zrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;&gt=
;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Cc:* <a hr=
ef=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a=
 href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt; &lt;ma=
ilto:<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt;=
<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:sfc@ie=
tf.org" target=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a href=3D"mailto:sfc=
@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Subject:* =
Re: PoT review/comments____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Hi Shwetha,=
____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Yes, I thin=
k it is a good idea. From your points, the second<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 one is<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0a bit confu=
sing to me... But I do not fully remember how the<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 model<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0was structu=
red, so I need to revise the document.____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Give me a d=
ay or two to explore again the model, and either we<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0exchange fe=
w emails with proposals for the extension, or we can<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0organise a =
quick call during next week to close a final<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 proposal to<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0share with =
other contributors.____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Thanks!____=
<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Best,____<b=
r>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Alejandro__=
__<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0__ __<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0El 12 de se=
ptiembre de 2019 a las 8:52:44, Shwetha Bhandari<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0(shwethab) =
(<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com=
</a> &lt;mailto:<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shw=
ethab@cisco.com</a>&gt;
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:shwethab@cisco.com"=
 target=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:shweth=
ab@cisco.com" target=3D"_blank">shwethab@cisco.com</a> &lt;mailto:<a href=
=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com</a>&gt;=
&gt;)<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0escribi=C3=
=B3:____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Hi Alejandr=
o, Diego,____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Since you a=
dded extension to do OPoT, should we extend the<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 model in<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0draft-ietf-=
sfc-proof-of-transit to enable OPoT and any<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 parameters<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0required fo=
r it=C2=A0 shared masks per link. If yes my proposal<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 will be<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0to:____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0 1. Augment=
 existing pot-profile with fields to Enable OPoT<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 and a<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0cipher scheme if needed.____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0 2. Separat=
e container in the model to define a map of (Node<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0link/interface, mask) to distribute pair wise masks. For<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 e.g.<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0Node link/interface identifier can be UUID as defined in<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 rfc8348<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0Or____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0 3. Masks c=
an be part of pot-profile.____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0What do you=
 think about revising the model with this?____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Thanks,____=
<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Shwetha____=
<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*From: *&qu=
ot;Frank Brockners (fbrockne)&quot; &lt;<a href=3D"mailto:fbrockne@cisco.co=
m" target=3D"_blank">fbrockne@cisco.com</a>
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:fbrockne@cisco.com"=
 target=3D"_blank">fbrockne@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:fbrock=
ne@cisco.com" target=3D"_blank">fbrockne@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:fbrockne@cisco.com" target=3D"_blank">fbrockne@cisco.com<=
/a> &lt;mailto:<a href=3D"mailto:fbrockne@cisco.com" target=3D"_blank">fbro=
ckne@cisco.com</a>&gt;&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Date: *Wed=
nesday, September 11, 2019 at 2:34 PM<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*To: *ALEJA=
NDRO AGUADO MARTIN<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=
=3D"mailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_blank">ale=
jandro.aguadomartin.ext@telefonica.com</a>
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:alejandro.aguadomar=
tin.ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin.ext@telefo=
nica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejan=
dro.aguadomartin.ext@telefonica.com" target=3D"_blank">alejandro.aguadomart=
in.ext@telefonica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_bla=
nk">alejandro.aguadomartin.ext@telefonica.com</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejan=
dro.aguadomartin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomar=
tin..ext@telefonica.com</a>&gt;&gt;&gt;, &quot;Diego R.<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Lopez&quot;=
 &lt;<a href=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_blank">dieg=
o.r.lopez@telefonica.com</a>
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:diego.r.lopez@telef=
onica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.=
r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&=
gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:diego.r..lopez@telefonica.com" target=3D"_blank">diego.r.=
.lopez@telefonica.com</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.=
r..lopez@telefonica.com" target=3D"_blank">diego.r..lopez@telefonica.com</a=
>&gt;&gt;&gt;, Carlos Pignataro<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;cpignat=
a@cisco..com &lt;mailto:<a href=3D"mailto:cpignata@cisco.com" target=3D"_bl=
ank">cpignata@cisco.com</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:cpigna=
ta@cisco.com" target=3D"_blank">cpignata@cisco.com</a>&gt;&gt;&gt;, Shwetha=
 bhandari<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=
=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com</a> &lt=
;mailto:<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@ci=
sco.com</a>&gt;
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:shwethab@cisco.com"=
 target=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:shweth=
ab@cisco.com" target=3D"_blank">shwethab@cisco.com</a> &lt;mailto:<a href=
=3D"mailto:shwethab@cisco." target=3D"_blank">shwethab@cisco.</a>.com&gt;&g=
t;&gt;, Tal
<br>
&gt; &gt; &gt;&gt;&gt;&gt; Mizrahi<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=
=3D"mailto:tal.mizrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gma=
il.com</a> &lt;mailto:<a href=3D"mailto:tal.mizrahi.phd@gmail.com" target=
=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mi=
zrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br=
>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mi=
zrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:tal.mizrahi.phd@gma=
il.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Cc: *&quot=
;<a href=3D"mailto:a..aguadom@fi.upm.es" target=3D"_blank">a..aguadom@fi.up=
m.es</a> &lt;mailto:<a href=3D"mailto:a..aguadom@fi.upm.es" target=3D"_blan=
k">a..aguadom@fi.upm.es</a>&gt;
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:a..aguadom@fi.upm.e=
s" target=3D"_blank">a..aguadom@fi.upm.es</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:a.agua=
dom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a> &lt;mailto:<a href=
=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a>&g=
t;&gt;&quot;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=
=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a> &=
lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguado=
m@fi.upm.es</a>&gt;
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es=
" target=3D"_blank">a.aguadom@fi.upm.es</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:a.agua=
dom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a> &lt;mailto:<a href=
=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a>&g=
t;&gt;&gt;,<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &quot;<a href=3D"mailto:sfc@ietf.or=
g" target=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a href=3D"mailto:sfc@ietf=
.org" target=3D"_blank">sfc@ietf.org</a>&gt; &lt;mailto:<a href=3D"mailto:s=
fc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a> &lt;mail=
to:<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt;&g=
t;&quot; &lt;<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org=
</a>
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:sfc@ietf.org" targe=
t=3D"_blank">sfc@ietf.org</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:sfc@ie=
tf.org" target=3D"_blank">sfc@ietf.org</a>&gt; &lt;mailto:<a href=3D"mailto=
:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a> &lt;mailto:<a href=3D"mai=
lto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt;&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Subject: *=
RE: PoT review/comments____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Hi Alejandr=
o,____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Thanks agai=
n for the review. Your comments have been<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 integrated into<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0draft-ietf-=
sfc-proof-of-transit-03 which just got posted.____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Cheers, Fra=
nk____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*From:*Fran=
k Brockners (fbrockne)<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Sent:* Mon=
tag, 27. Mai 2019 18:18<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*To:* ALEJA=
NDRO AGUADO MARTIN<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=
=3D"mailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_blank">ale=
jandro.aguadomartin.ext@telefonica.com</a>
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:alejandro.aguadomar=
tin.ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin.ext@telefo=
nica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejan=
dro.aguadomartin.ext@telefonica.com" target=3D"_blank">alejandro.aguadomart=
in.ext@telefonica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_bla=
nk">alejandro.aguadomartin.ext@telefonica.com</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejan=
dro.aguadomartin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomar=
tin..ext@telefonica.com</a>&gt;&gt;&gt;; Diego R. Lopez<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=
=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@te=
lefonica.com</a>
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:diego.r.lopez@telef=
onica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.=
r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&=
gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_blank">diego.r.l=
opez@telefonica.com</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.=
r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&=
gt;&gt;&gt;; Carlos Pignataro (cpignata)<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=
=3D"mailto:cpignata@cisco.com" target=3D"_blank">cpignata@cisco.com</a> &lt=
;mailto:<a href=3D"mailto:cpignata@cisco.com" target=3D"_blank">cpignata@ci=
sco.com</a>&gt;
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:cpignata@cisco.com"=
 target=3D"_blank">cpignata@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:cpigna=
ta@cisco.com" target=3D"_blank">cpignata@cisco.com</a> &lt;mailto:<a href=
=3D"mailto:cpignata@cisco." target=3D"_blank">cpignata@cisco.</a>.com&gt;&g=
t;&gt;; Shwetha<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Bhandari<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0(shwethab) =
&lt;<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.=
com</a> &lt;mailto:<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">=
shwethab@cisco.com</a>&gt;
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:shwethab@cisco.com"=
 target=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:shweth=
ab@cisco.com" target=3D"_blank">shwethab@cisco.com</a> &lt;mailto:<a href=
=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com</a>&gt;=
&gt;&gt;; Tal<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Mizrahi &lt=
;<a href=3D"mailto:tal.mizrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi=
.phd@gmail.com</a>
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:tal.mizrahi.phd@gma=
il.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mi=
zrahi.phd@gmail." target=3D"_blank">tal.mizrahi.phd@gmail.</a>.com&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mi=
zrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:tal.mizrahi.phd@gma=
il.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Cc:* <a hr=
ef=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">
a.aguadom@fi.upm.es</a> &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es" t=
arget=3D"_blank">a.aguadom@fi.upm.es</a>&gt;
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es=
" target=3D"_blank">a.aguadom@fi.upm.es</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:a.agua=
dom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a> &lt;mailto:<a href=
=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a>&g=
t;&gt;;<br>
&gt; &gt; &gt;&gt;&gt;&gt; <a href=3D"mailto:sfc@ietf.org" target=3D"_blank=
">sfc@ietf.org</a> &lt;mailto:<a href=3D"mailto:sfc@ietf.org" target=3D"_bl=
ank">sfc@ietf.org</a>&gt; &lt;mailto:<a href=3D"mailto:sfc@ietf.org" target=
=3D"_blank">sfc@ietf.org</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a> &lt;mail=
to:<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt;&g=
t;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Subject:* =
RE: PoT review/comments____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Hi Alejandr=
o,____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Many thanks=
 for the comments =E2=80=93 and sorry for the delay =E2=80=93<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0unfortunate=
ly your email somehow got dropped from my todo list.<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Please see =
inline=E2=80=A6____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0(cc=E2=80=
=99ing the list as well).____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*From:*ALEJ=
ANDRO AGUADO MARTIN<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=
=3D"mailto:alejandro.aguadomartin..ext@telefonica.com" target=3D"_blank">al=
ejandro.aguadomartin..ext@telefonica.com</a>
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:alejandro.aguadomar=
tin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomartin..ext@tele=
fonica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejan=
dro.aguadomartin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomar=
tin..ext@telefonica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:alejandro.aguadomartin.ext@telefonica.com" target=3D"_bla=
nk">alejandro.aguadomartin.ext@telefonica.com</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:alejan=
dro.aguadomartin..ext@telefonica.com" target=3D"_blank">alejandro.aguadomar=
tin..ext@telefonica.com</a>&gt;&gt;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Sent:* Mon=
tag, 15. April 2019 17:27<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*To:* Diego=
 R. Lopez &lt;<a href=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_bl=
ank">diego.r.lopez@telefonica.com</a>
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:diego.r.lopez@telef=
onica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.=
r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&=
gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:diego.r.lopez@telefonica.com" target=3D"_blank">diego.r.l=
opez@telefonica.com</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:diego.=
r.lopez@telefonica.com" target=3D"_blank">diego.r.lopez@telefonica.com</a>&=
gt;&gt;&gt;; Carlos Pignataro (cpignata)<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;<a href=
=3D"mailto:cpignata@cisco.com" target=3D"_blank">cpignata@cisco.com</a> &lt=
;mailto:<a href=3D"mailto:cpignata@cisco.com" target=3D"_blank">cpignata@ci=
sco.com</a>&gt;
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:cpignata@cisco.com"=
 target=3D"_blank">cpignata@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:cpigna=
ta@cisco.com" target=3D"_blank">cpignata@cisco.com</a> &lt;mailto:<a href=
=3D"mailto:cpignata@cisco." target=3D"_blank">cpignata@cisco.</a>.com&gt;&g=
t;&gt;; Frank<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Brockners<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0(fbrockne) =
&lt;<a href=3D"mailto:fbrockne@cisco.com" target=3D"_blank">fbrockne@cisco.=
com</a> &lt;mailto:<a href=3D"mailto:fbrockne@cisco.com" target=3D"_blank">=
fbrockne@cisco.com</a>&gt;
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:fbrockne@cisco.com"=
 target=3D"_blank">fbrockne@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:fbrock=
ne@cisco.com" target=3D"_blank">fbrockne@cisco.com</a> &lt;mailto:<a href=
=3D"mailto:fbrockne@cisco.com" target=3D"_blank">fbrockne@cisco.com</a>&gt;=
&gt;&gt;; Shwetha<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Bhandari (s=
hwethab) &lt;<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shweth=
ab@cisco.com</a>
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:shwethab@cisco.com"=
 target=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:shweth=
ab@cisco.com" target=3D"_blank">shwethab@cisco.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwethab@cisco.com<=
/a> &lt;mailto:<a href=3D"mailto:shwethab@cisco.com" target=3D"_blank">shwe=
thab@cisco.com</a>&gt;&gt;&gt;;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Tal Mizrahi &lt;<a href=3D"mailto:t=
al.mizrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:tal.mizrahi.phd@gma=
il.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mi=
zrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br=
>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0&lt;mailto:=
<a href=3D"mailto:tal.mizrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.=
phd@gmail.com</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:tal.mi=
zrahi.phd@gmail.com" target=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;&gt=
;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Cc:* <a hr=
ef=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">
a.aguadom@fi.upm.es</a> &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es" t=
arget=3D"_blank">a.aguadom@fi.upm.es</a>&gt;
<br>
&gt; &gt; &gt;&gt;&gt;&gt; &lt;mailto:<a href=3D"mailto:a.aguadom@fi.upm.es=
" target=3D"_blank">a.aguadom@fi.upm.es</a>&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &lt;mailto:<a href=3D"mailto:a.agua=
dom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a> &lt;mailto:<a href=
=3D"mailto:a.aguadom@fi.upm.es" target=3D"_blank">a.aguadom@fi.upm.es</a>&g=
t;&gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*Subject:* =
PoT review/comments____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Dear all,__=
__<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0I gave a qu=
ick review to the PoT document. Some comments:____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0- I read =
=E2=80=9CThe non-constant coefficients are used to <br>
&gt; &gt; &gt;&gt;&gt;&gt; generate the<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Lagrange Po=
lynomial Constants (LPC).=E2=80=9D As far as I<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 understood, the<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0points assi=
gned to each node (Xi) are the ones used for<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 generating<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0the LPCi, a=
ren=E2=80=99t they?____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/=E2=80=A6=
FB: Good catch. The LPCs are of course computed using (x_i,<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0y_i)./*____=
<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0- If we go =
for including the YANG in the current document<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 (which I<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0agree), par=
ameters should be described before the yang<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 definition,<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0and maybe i=
t would be helpful to have the yang tree (see the<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 current<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0version att=
ached).____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/=E2=80=A6=
FB: Thanks. IMHO it makes sense to keep the YANG model <br>
&gt; &gt; &gt;&gt;&gt;&gt; in the<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0current doc=
, given that the model and the description go <br>
&gt; &gt; &gt;&gt;&gt;&gt; hand in<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0hand. We ca=
n of course also include the yang tree to make<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 reading<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0easier. Thi=
s is consistent with other documents which<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 specify YANG<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0models./*__=
__<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0- I include=
 in the attached file few questions about naming<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 of some<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0parameters.=
____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*//*____<br=
>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/=E2=80=A6=
FB:<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0- naming F_=
i(x_i, y_i) =E2=80=93 I agree that a better name could be<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 used.<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0The only po=
tential concern would be that the open source<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0implementat=
ion in OpenDaylight uses this naming =E2=80=93 changing<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 it might<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0lead to con=
fusion.. We can start with adding a comment to make<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0things clea=
rer./*____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*//*____<br=
>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/- secret =
key =E2=80=93 this is the constant part of the first<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 polynomial<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0which serve=
s as the secret =E2=80=93 and which is re-retrieved.<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Again, we<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0can update =
the description to make things clearer./*____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*//*____<br=
>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/- size of=
 the random number: This is unrelated to OPOT.<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 The random<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0number is t=
o uniquely identify a packet. There is a trade-off<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0between the=
 size of the random number and how often you need to<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0re-key your=
 system. At high speeds, the random number =E2=80=93 which<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0identifies =
a particular packet =E2=80=93 is used up quite quickly if<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 it is<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0only 32-bit=
 wide. See section 4<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; <br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 /*<a href=3D"https://=
tools.ietf.org/html/draft-ietf-sfc-proof-of-transit-02#section-4____" rel=
=3D"noreferrer" target=3D"_blank">https://tools.ietf.org/html/draft-ietf-sf=
c-proof-of-transit-02#section-4____</a><br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*//*____<br=
>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/- number =
of profiles: For a deployment which is expected<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 to renew<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0keys every =
now and then (e.g. you run with 32-bit random<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 numbers at<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0reasonably =
high speeds), you need at least 2 profiles =E2=80=93 an<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 active<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0one and one=
 that you can activate once you run out of random<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 numbers<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0(which is w=
hat the encapsulating node would decide).. /*____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0- I have ch=
ecked some of the existing YANG files within the<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 IETF to<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0see in whic=
h it would be helpful to include. From the (not<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 so) old<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0OpenFlow, I=
 assume that one match is necessary (for <br>
&gt; &gt; &gt;&gt;&gt;&gt; identify the<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0iOAM/PoT he=
ader) whilst the source node can use any existing<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 match<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0field to id=
entify packets where to apply the PoT scheme. In<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 terms of<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0actions, I =
would say that two may be required: for any node, an<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0update-pot =
is necessary, while the verifier would need a<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 verify-pot<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0type of act=
ion, that would ideally either remove the header<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 or drop<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0the packet =
if fails (I do not know if you are thinking in more<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0complex sce=
narios).____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*//*____<br=
>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/=E2=80=A6=
FB: From an OF perspective, that sounds feasible.. That<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 said, we<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0probably wa=
nt to avoid making the spec specific to a<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 technology like<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0OF, hence w=
ould suggest that we don=E2=80=99t specify such a <br>
&gt; &gt; &gt;&gt;&gt;&gt; behavior as<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0part of thi=
s document./*____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*//*____<br=
>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0- For this =
last point, I have seen the definitions within<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0draft-asech=
oud-rtgwg-qos-model-08, where matched could map<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 (if I am<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0not wrong) =
to classifiers/filters, and actions to actions. I<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 send<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0you the mod=
els in a zip file. In this sense the model to be<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 defined<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0in the PoT =
shall be an augment of the models defined in that<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0document. I=
 have not done a very deep revision on the model,<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 but I<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0think it co=
uld fit there. If you have check this or other<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 models,<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0let me know=
 so I could also help.____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*//*____<br=
>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/=E2=80=A6=
FB: Per my note above: In order to keep POT generic and<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 not link<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0it to a par=
ticular classification mechanism, I=E2=80=99d prefer to<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 keep the<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0classificat=
ion question as out of scope for the current<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 document.<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0That way it=
 can also apply to technologies which come with<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 their own<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0way to clas=
sify =E2=80=93 and which might fully decouple the tunneling<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0aspects fro=
m the classification aspects. /*____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Thanks a lo=
t and sorry for such long email.____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/..FB: Tha=
nks again for all your comments. We=E2=80=99ll get them<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 included<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0in the next=
 revision. /*____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*//*____<br=
>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0*/Cheers, F=
rank/*____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Best,____<b=
r>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Alejandro__=
__<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0____<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt; <br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 ---------------------=
---------------------------------------------------<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Este mensaj=
e y sus adjuntos se dirigen exclusivamente a su<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0destinatari=
o, puede contener informaci=C3=B3n privilegiada o<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 confidencial<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0y es para u=
so exclusivo de la persona o entidad de destino.<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 Si no es<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0usted. el d=
estinatario indicado, queda notificado de que la<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 lectura,<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0utilizaci=
=C3=B3n, divulgaci=C3=B3n y/o copia sin autorizaci=C3=B3n puede estar<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0prohibida e=
n virtud de la legislaci=C3=B3n vigente. Si ha<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 recibido este<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0mensaje por=
 error, le rogamos que nos lo comunique<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 inmediatamente<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0por esta mi=
sma v=C3=ADa y proceda a su destrucci=C3=B3n.<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0The informa=
tion contained in this transmission is <br>
&gt; &gt; &gt;&gt;&gt;&gt; privileged and<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0confidentia=
l information intended only for the use of the<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 individual<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0or entity n=
amed above. If the reader of this message is not the<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0intended re=
cipient, you are hereby notified that any<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 dissemination,<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0distributio=
n or copying of this communication is strictly<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0prohibited.=
 If you have received this transmission in error,<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 do not<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0read it. Pl=
ease immediately reply to the sender that you have<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0received th=
is communication in error and then delete it.<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0Esta mensag=
em e seus anexos se dirigem exclusivamente ao seu<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0destinat=C3=
=A1rio, pode conter informa=C3=A7=C3=A3o privilegiada ou<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 confidencial e<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0=C3=A9 para=
 uso exclusivo da pessoa ou entidade de destino. Se n=C3=A3o =C3=A9<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0vossa senho=
ria o destinat=C3=A1rio indicado, fica notificado de <br>
&gt; &gt; &gt;&gt;&gt;&gt; que a<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0leitura, ut=
iliza=C3=A7=C3=A3o, divulga=C3=A7=C3=A3o e/ou c=C3=B3pia sem autoriza=C3=A7=
=C3=A3o pode<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0estar proib=
ida em virtude da legisla=C3=A7=C3=A3o vigente. Se recebeu <br>
&gt; &gt; &gt;&gt;&gt;&gt; esta<br>
&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0mensagem po=
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via e proceda a sua destrui=C3=A7=C3=A3o____<br>
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&gt; &gt; &gt;&gt;&gt;&gt;=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 =C2=A0___________=
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c@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt;
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&gt; <br>
<br>
</blockquote>
</div>
</div>
</blockquote>
</div>
<br>
</div>
</div>

</blockquote></div>

--000000000000e4a5f105a24375d0--


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From: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
To: Greg Mirsky <gregimirsky@gmail.com>
CC: "Joel M. Halpern" <jmh@joelhalpern.com>, "sfc@ietf.org" <sfc@ietf.org>
Thread-Topic: [sfc] draft-ietf-sfc-proof-of-transit-04 ready for WGLC? (was RE: PoT review/comments)
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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Tue, 7 Apr 2020 10:40:02 -0700
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To: "Frank Brockners (fbrockne)" <fbrockne@cisco.com>
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Subject: Re: [sfc] I-D Action: draft-ietf-sfc-ioam-nsh-03.txt
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--00000000000038742205a2b6e080
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Hi Frank,
thank you for your consideration of my comments and for sharing your views.
Please find my notes in-lined below under the GIM>> tag.

Regards,
Greg

On Mon, Apr 6, 2020 at 1:46 AM Frank Brockners (fbrockne) <
fbrockne@cisco.com> wrote:

> Hi Greg,
>
> Please see inline ("...FB"):
>
>
> From: Greg Mirsky <gregimirsky@gmail.com>
> Sent: Donnerstag, 2. April 2020 00:45
> To: Frank Brockners (fbrockne) <fbrockne@cisco.com>
> Cc: sfc@ietf.org
> Subject: Re: [sfc] I-D Action: draft-ietf-sfc-ioam-nsh-03.txt
>
> Hi Frank, et al.,
> thank you for the updates. I have a couple of questions and appreciate if
> you and the WG consider them:
> =E2=80=A2 in the Introduction, the term "in-situ" is explained as follows=
:
>    The term "in-situ" refers to the fact
>    that the OAM data is added to the data packets rather than is being
>    sent within packets specifically dedicated to OAM.
> That is reasonable since the draft only references
> https://datatracker.ietf.org/doc/draft-ietf-ippm-ioam-data/. As those,
> following work on iOAM in IPPM WG, know several new iOAM behaviors, e.g.,
> https://datatracker.ietf.org/doc/draft-ietf-ippm-ioam-direct-export/,
> https://datatracker.ietf.org/doc/draft-ietf-ippm-ioam-flags/ and Active,
> have been defined in new IPPM WG drafts. Are these behaviors applicable t=
o
> iOAM in SFC NSH?
>
> ...FB: Thanks to your review comments on draft-ietf-ippm-ioam-data, the
> latest draft draft-ietf-ippm-ioam-data-09 already touches on the fact tha=
t
> the term "In-situ OAM" has evolved and is no longer referring to the
> exclusive use of piggybacking OAM information onto live customer traffic =
as
> the packet traverses the network (see the introduction section of
> draft-ietf-ippm-ioam-data-09). It makes sense to harmonize the intro in
> draft-ietf-sfc-ioam-nsh with draft-ietf-ippm-ioam-data-09.
> And to your question: I could see e.g. direct export useful to IOAM
> deployments which use NSH encapsulation.
>
GIM>> Thank you.  I appreciate that the updated draft-ietf-ippm-ioam-data
now explicitly refers to the DEX mode. Probably a similar reference is
suitable for the NSH iOAM draft. Do you think it should be in the normative
references list? Also, draft-ietf-ippm-ioam-flags defines new behaviors,
e.g., Loopback and Active. Are these applicable to iOAM in SFC NSH?

>
>
> =E2=80=A2 the second question is related to the discussion of the iOAM
> encapsulation in NSH. I couldn't find explicitly stated requirements that
> are based on quantitative metrics. The text refers to "large networks",
> "can grow quite large" and alike. Do we have an example of a large SFC
> network? And if the size of MD Type 2 meta-data might be limiting in some
> scenarios, iOAM now has defined the Direct Export mode that supports the
> collection of any practical information from each iOAM node. I think that
> the use of the Direct Export or other methods that collect iOAM informati=
on
> in a dedicated packet can be recommended. As a result, the choice of the
> iOAM encapsulation in NSH can be re-considered.
>
> ...FB: We can include some sample quantitative calculations to point out
> the limitations - which might be better than calling out an explicit
> example network deployment, which could be inappropriate for a spec. To
> illustrate the problem why approach #1 in section 4.1 is challenging, we
> can include some quantitative figures, like the following case:
>
GIM>> Thank you. Looking forward to the update. Will be much obliged if you
can share the text before it is published.

> IOAM tracing with node-id in wide format (8), egress/ingress interface in
> wide format (8), timestamp second (4) and subsecond (4), buffer occupancy
> (4), transit delay (4). This would require a total of 4 + n*32 octets. If
> you're space-limited to 256 bytes, you can record at most 7 hops.
> In case you'd add namespace-specific-data in wide format (8) to the above
> example, then you'd be down to 6 hops if you need to fit things into 256
> bytes.
>
GIM>> Indeed, 256 bytes is a limit that an operator should consider. And
the operator can choose the proper mode to collect iOAM data, in-the-packet
or DEX, based on that consideration.

> I don't think there is a need to reconsider the choice of the IOAM
> encapsulation for NSH. The WG discussed the topic in several meetings and
> the current text is what we arrived at. I don't think that anything has
> changed that would require us to re-open the discussion.
>
GIM>> I think that the work on the DEX mode is an important development
that requires a new discussion and reconsideration of how
iOAM encapsulated in SFC NSH by the working group.

>
> Cheers, Frank
>
> Regards,
> Greg
>
> On Thu, Mar 19, 2020 at 6:49 AM Frank Brockners (fbrockne)
> <fbrockne=3Dmailto:40cisco.com@dmarc.ietf.org> wrote:
> Quick update: I've just posted a new revision of draft-ietf-sfc-ioam-nsh.
>
> This update includes editorial fixes only - mainly an alignment to the
> nomenclature used in draft-ietf-ippm-ioam-data.
>
> Are there any further comments on this draft? Are we ready to move to WG
> LC?
>
> Thanks, Frank
>
> > -----Original Message-----
> > From: sfc <mailto:sfc-bounces@ietf.org> On Behalf Of mailto:
> internet-drafts@ietf.org
> > Sent: Donnerstag, 19. M=C3=A4rz 2020 14:39
> > To: mailto:i-d-announce@ietf.org
> > Cc: mailto:sfc@ietf.org
> > Subject: [sfc] I-D Action: draft-ietf-sfc-ioam-nsh-03.txt
> >
> >
> > A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> > This draft is a work item of the Service Function Chaining WG of the
> IETF.
> >
> >         Title           : Network Service Header (NSH) Encapsulation fo=
r
> In-situ OAM
> > (IOAM) Data
> >         Authors         : Frank Brockners
> >                           Shwetha Bhandari
> >       Filename        : draft-ietf-sfc-ioam-nsh-03.txt
> >       Pages           : 9
> >       Date            : 2020-03-19
> >
> > Abstract:
> >    In-situ Operations, Administration, and Maintenance (IOAM) records
> >    operational and telemetry information in the packet while the packet
> >    traverses a path between two points in the network.  This document
> >    outlines how IOAM data fields are encapsulated in the Network Servic=
e
> >    Header (NSH).
> >
> >
> > The IETF datatracker status page for this draft is:
> > https://datatracker.ietf.org/doc/draft-ietf-sfc-ioam-nsh/
> >
> > There are also htmlized versions available at:
> > https://tools.ietf.org/html/draft-ietf-sfc-ioam-nsh-03
> > https://datatracker.ietf.org/doc/html/draft-ietf-sfc-ioam-nsh-03
> >
> > A diff from the previous version is available at:
> > https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-sfc-ioam-nsh-03
> >
> >
> > Please note that it may take a couple of minutes from the time of
> submission
> > until the htmlized version and diff are available at
> http://tools.ietf.org.
> >
> > Internet-Drafts are also available by anonymous FTP at:
> > ftp://ftp.ietf.org/internet-drafts/
> >
> >
> > _______________________________________________
> > sfc mailing list
> > mailto:sfc@ietf.org
> > https://www.ietf.org/mailman/listinfo/sfc
>
> _______________________________________________
> sfc mailing list
> mailto:sfc@ietf.org
> https://www.ietf.org/mailman/listinfo/sfc
>

--00000000000038742205a2b6e080
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div dir=3D"ltr">Hi Frank,<div>thank you for your consider=
ation of my comments and for sharing your views. Please find my notes in-li=
ned below under the GIM&gt;&gt; tag.</div><div><br></div><div>Regards,</div=
><div>Greg</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=
=3D"gmail_attr">On Mon, Apr 6, 2020 at 1:46 AM Frank Brockners (fbrockne) &=
lt;<a href=3D"mailto:fbrockne@cisco.com">fbrockne@cisco.com</a>&gt; wrote:<=
br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8e=
x;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi Greg,<br>
<br>
Please see inline (&quot;...FB&quot;):<br>
<br>
<br>
From: Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_b=
lank">gregimirsky@gmail.com</a>&gt; <br>
Sent: Donnerstag, 2. April 2020 00:45<br>
To: Frank Brockners (fbrockne) &lt;<a href=3D"mailto:fbrockne@cisco.com" ta=
rget=3D"_blank">fbrockne@cisco.com</a>&gt;<br>
Cc: <a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a><br>
Subject: Re: [sfc] I-D Action: draft-ietf-sfc-ioam-nsh-03.txt<br>
<br>
Hi Frank, et al.,<br>
thank you for the updates. I have a couple of questions and appreciate if y=
ou and the WG consider them:<br>
=E2=80=A2 in the Introduction, the term &quot;in-situ&quot; is explained as=
 follows:<br>
=C2=A0 =C2=A0The term &quot;in-situ&quot; refers to the fact<br>
=C2=A0 =C2=A0that the OAM data is added to the data packets rather than is =
being<br>
=C2=A0 =C2=A0sent within packets specifically dedicated to OAM.<br>
That is reasonable since the draft only references <a href=3D"https://datat=
racker.ietf.org/doc/draft-ietf-ippm-ioam-data/" rel=3D"noreferrer" target=
=3D"_blank">https://datatracker.ietf.org/doc/draft-ietf-ippm-ioam-data/</a>=
. As those, following work on iOAM in IPPM WG, know several new iOAM behavi=
ors, e.g.,=C2=A0<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-ippm=
-ioam-direct-export/" rel=3D"noreferrer" target=3D"_blank">https://datatrac=
ker.ietf.org/doc/draft-ietf-ippm-ioam-direct-export/</a>, <a href=3D"https:=
//datatracker.ietf.org/doc/draft-ietf-ippm-ioam-flags/" rel=3D"noreferrer" =
target=3D"_blank">https://datatracker.ietf.org/doc/draft-ietf-ippm-ioam-fla=
gs/</a>=C2=A0and Active, have been defined in new IPPM WG drafts. Are these=
 behaviors applicable to iOAM in SFC NSH?<br>
<br>
...FB: Thanks to your review comments on draft-ietf-ippm-ioam-data, the lat=
est draft draft-ietf-ippm-ioam-data-09 already touches on the fact that the=
 term &quot;In-situ OAM&quot; has evolved and is no longer referring to the=
 exclusive use of piggybacking OAM information onto live customer traffic a=
s the packet traverses the network (see the introduction section of draft-i=
etf-ippm-ioam-data-09). It makes sense to harmonize the intro in draft-ietf=
-sfc-ioam-nsh with draft-ietf-ippm-ioam-data-09.<br>
And to your question: I could see e.g. direct export useful to IOAM deploym=
ents which use NSH encapsulation.=C2=A0 <br></blockquote><div>GIM&gt;&gt; T=
hank you.=C2=A0 I appreciate that the updated draft-ietf-ippm-ioam-data now=
 explicitly refers to the DEX mode. Probably a similar reference is suitabl=
e for the NSH iOAM draft. Do you think it should be in the normative refere=
nces list? Also, draft-ietf-ippm-ioam-flags defines new behaviors, e.g., Lo=
opback and Active. Are these applicable to iOAM in SFC NSH?</div><blockquot=
e class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px s=
olid rgb(204,204,204);padding-left:1ex">
<br>
<br>
=E2=80=A2 the second question is related to the discussion of the iOAM enca=
psulation in NSH. I couldn&#39;t find explicitly stated requirements that a=
re based on quantitative=C2=A0metrics. The text refers to &quot;large netwo=
rks&quot;, &quot;can grow quite large&quot; and alike. Do we have an exampl=
e of a large SFC network? And if the size of MD Type 2 meta-data might be l=
imiting in some scenarios, iOAM now has defined the Direct Export mode that=
 supports the collection of any practical information from each iOAM node. =
I think that the use of the Direct Export or other methods that collect iOA=
M information in a dedicated packet can be recommended. As a result, the ch=
oice of the iOAM encapsulation in NSH can be re-considered.<br>
<br>
...FB: We can include some sample quantitative calculations to point out th=
e limitations - which might be better than calling out an explicit example =
network deployment, which could be inappropriate for a spec. To illustrate =
the problem why approach #1 in section 4.1 is challenging, we can include s=
ome quantitative figures, like the following case: <br></blockquote><div>GI=
M&gt;&gt; Thank you. Looking forward to the update. Will be much obliged if=
 you can share the text before it is published.=C2=A0</div><blockquote clas=
s=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid r=
gb(204,204,204);padding-left:1ex">
IOAM tracing with node-id in wide format (8), egress/ingress interface in w=
ide format (8), timestamp second (4) and subsecond (4), buffer occupancy (4=
), transit delay (4). This would require a total of 4 + n*32 octets. If you=
&#39;re space-limited to 256 bytes, you can record at most 7 hops.<br>
In case you&#39;d add namespace-specific-data in wide format (8) to the abo=
ve example, then you&#39;d be down to 6 hops if you need to fit things into=
 256 bytes. <br></blockquote><div>GIM&gt;&gt; Indeed, 256 bytes is a limit =
that an operator should consider. And the operator can choose the proper=C2=
=A0mode to collect iOAM data, in-the-packet or DEX, based on that considera=
tion.</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.=
8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
I don&#39;t think there is a need to reconsider the choice of the IOAM enca=
psulation for NSH. The WG discussed the topic in several meetings and the c=
urrent text is what we arrived at. I don&#39;t think that anything has chan=
ged that would require us to re-open the discussion.<br></blockquote><div>G=
IM&gt;&gt; I think that the work on the DEX mode is an important developmen=
t that requires a new discussion and reconsideration of how iOAM=C2=A0encap=
sulated=C2=A0in SFC NSH by the working group.=C2=A0</div><blockquote class=
=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rg=
b(204,204,204);padding-left:1ex">
<br>
Cheers, Frank<br>
<br>
Regards,<br>
Greg<br>
<br>
On Thu, Mar 19, 2020 at 6:49 AM Frank Brockners (fbrockne) &lt;fbrockne=3Dm=
ailto:<a href=3D"mailto:40cisco.com@dmarc.ietf.org" target=3D"_blank">40cis=
co.com@dmarc.ietf.org</a>&gt; wrote:<br>
Quick update: I&#39;ve just posted a new revision of draft-ietf-sfc-ioam-ns=
h.<br>
<br>
This update includes editorial fixes only - mainly an alignment to the nome=
nclature used in draft-ietf-ippm-ioam-data.<br>
<br>
Are there any further comments on this draft? Are we ready to move to WG LC=
?<br>
<br>
Thanks, Frank<br>
<br>
&gt; -----Original Message-----<br>
&gt; From: sfc &lt;mailto:<a href=3D"mailto:sfc-bounces@ietf.org" target=3D=
"_blank">sfc-bounces@ietf.org</a>&gt; On Behalf Of mailto:<a href=3D"mailto=
:internet-drafts@ietf.org" target=3D"_blank">internet-drafts@ietf.org</a><b=
r>
&gt; Sent: Donnerstag, 19. M=C3=A4rz 2020 14:39<br>
&gt; To: mailto:<a href=3D"mailto:i-d-announce@ietf.org" target=3D"_blank">=
i-d-announce@ietf.org</a><br>
&gt; Cc: mailto:<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.=
org</a><br>
&gt; Subject: [sfc] I-D Action: draft-ietf-sfc-ioam-nsh-03.txt<br>
&gt; <br>
&gt; <br>
&gt; A New Internet-Draft is available from the on-line Internet-Drafts dir=
ectories.<br>
&gt; This draft is a work item of the Service Function Chaining WG of the I=
ETF.<br>
&gt; <br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Title=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0: Network Service Header (NSH) Encapsulation for In-situ OAM<br>
&gt; (IOAM) Data<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Authors=C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0: Frank Brockners<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0Shwetha Bhandari<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0Filename=C2=A0 =C2=A0 =C2=A0 =C2=A0 : draft-=
ietf-sfc-ioam-nsh-03.txt<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0Pages=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0: 9<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0Date=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 : 2020-03-19<br>
&gt; <br>
&gt; Abstract:<br>
&gt;=C2=A0 =C2=A0 In-situ Operations, Administration, and Maintenance (IOAM=
) records<br>
&gt;=C2=A0 =C2=A0 operational and telemetry information in the packet while=
 the packet<br>
&gt;=C2=A0 =C2=A0 traverses a path between two points in the network.=C2=A0=
 This document<br>
&gt;=C2=A0 =C2=A0 outlines how IOAM data fields are encapsulated in the Net=
work Service<br>
&gt;=C2=A0 =C2=A0 Header (NSH).<br>
&gt; <br>
&gt; <br>
&gt; The IETF datatracker status page for this draft is:<br>
&gt; <a href=3D"https://datatracker.ietf.org/doc/draft-ietf-sfc-ioam-nsh/" =
rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.org/doc/draft=
-ietf-sfc-ioam-nsh/</a><br>
&gt; <br>
&gt; There are also htmlized versions available at:<br>
&gt; <a href=3D"https://tools.ietf.org/html/draft-ietf-sfc-ioam-nsh-03" rel=
=3D"noreferrer" target=3D"_blank">https://tools.ietf.org/html/draft-ietf-sf=
c-ioam-nsh-03</a><br>
&gt; <a href=3D"https://datatracker.ietf.org/doc/html/draft-ietf-sfc-ioam-n=
sh-03" rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.org/do=
c/html/draft-ietf-sfc-ioam-nsh-03</a><br>
&gt; <br>
&gt; A diff from the previous version is available at:<br>
&gt; <a href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-sfc-ioam-nsh=
-03" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/rfcdiff?url2=
=3Ddraft-ietf-sfc-ioam-nsh-03</a><br>
&gt; <br>
&gt; <br>
&gt; Please note that it may take a couple of minutes from the time of subm=
ission<br>
&gt; until the htmlized version and diff are available at <a href=3D"http:/=
/tools.ietf.org" rel=3D"noreferrer" target=3D"_blank">http://tools.ietf.org=
</a>.<br>
&gt; <br>
&gt; Internet-Drafts are also available by anonymous FTP at:<br>
&gt; <a href=3D"ftp://ftp.ietf.org/internet-drafts/" rel=3D"noreferrer" tar=
get=3D"_blank">ftp://ftp.ietf.org/internet-drafts/</a><br>
&gt; <br>
&gt; <br>
&gt; _______________________________________________<br>
&gt; sfc mailing list<br>
&gt; mailto:<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org<=
/a><br>
&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/sfc" rel=3D"noreferre=
r" target=3D"_blank">https://www.ietf.org/mailman/listinfo/sfc</a><br>
<br>
_______________________________________________<br>
sfc mailing list<br>
mailto:<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a><b=
r>
<a href=3D"https://www.ietf.org/mailman/listinfo/sfc" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/listinfo/sfc</a><br>
</blockquote></div></div>

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From: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
To: "wei.yuehua@zte.com.cn" <wei.yuehua@zte.com.cn>
CC: "sfc@ietf.org" <sfc@ietf.org>
Thread-Topic: [sfc] draft-ietf-sfc-nsh-tlv-02 - Network Service Header TLVs
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Date: Wed, 8 Apr 2020 16:43:40 +0000
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CC: "sfc@ietf.org" <sfc@ietf.org>
Thread-Topic: [sfc] draft-ietf-sfc-nsh-tlv-02 - Network Service Header TLVs
Thread-Index: AQHWD0+RoXgAdJ3KdUKRBoMAgof5FqhyqKew
Date: Fri, 10 Apr 2020 18:18:40 +0000
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References: <D26A88B6-BE99-4BEA-9739-9DEADAB4D196@cisco.com,> <639BDC8B-13B0-48CF-B4C1-ACB834DEC4A5@cisco.com> <202004101047428213142@zte.com.cn> <7750B74D-0539-4034-987B-5262E24BBE80@cisco.com>
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Subject: Re: [sfc] draft-ietf-sfc-nsh-tlv-02 - Network Service Header TLVs
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Service Function Chaining WG of the IETF.

        Title           : Service Function Chaining (SFC) Operations, Administration and Maintenance (OAM) Framework
        Authors         : Sam K. Aldrin
                          Carlos Pignataro
                          Nagendra Kumar
                          Ram Krishnan
                          Anoop Ghanwani
	Filename        : draft-ietf-sfc-oam-framework-12.txt
	Pages           : 21
	Date            : 2020-04-10

Abstract:
   This document provides a reference framework for Operations,
   Administration and Maintenance (OAM) for Service Function Chaining
   (SFC).



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-sfc-oam-framework/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-sfc-oam-framework-12
https://datatracker.ietf.org/doc/html/draft-ietf-sfc-oam-framework-12

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-sfc-oam-framework-12


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/



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Subject: [sfc] Ping and traceroute in SFP
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Dear All,
drat-ietf-sfc-oam-requirements suggests that ICMP "can be used for some of
the connectivity functions [ of SFC]". Indeed, ICMP can be used to ping an
SFF given its IP address is known to the sender. But I don't see that ICMP
can be used to trace an SFP. The draft suggests the following procedure:

the initiator could send OAM packets with sequentially incrementing the TTL
in the NSH to trace the SFP.

But I think that this approach would not work. Please consider what happens
when a packet gets to the control plane. The NSH is removed. As a result,
the ICMP packet with the IP destination address of the last SFF is
revealed. I think that the node will forward the packet instead of sending
the ICMP echo reply back to the sender.
It was the motivation for the work on SFC Echo Request/Reply, work that the
SFC WG hs adopted. The draft defines formats of SFC Echo Reply/Request and
mechanisms necessary to perform ping and trace functions on an SFP. The
draft has been stable and authors would appreciate WG Chairs consideration
for WFLC.

Regards,
Greg

--000000000000aed19d05a33538e3
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<div dir=3D"ltr">Dear All,<div>drat-ietf-sfc-oam-requirements suggests that=
 ICMP &quot;can be used for some of the connectivity functions [ of SFC]&qu=
ot;. Indeed, ICMP can be used to ping an SFF given its IP address is known =
to the sender. But I don&#39;t see that ICMP can be used to trace an SFP. T=
he draft suggests the following procedure:</div><blockquote style=3D"margin=
:0 0 0 40px;border:none;padding:0px"><div>the initiator could send OAM pack=
ets with sequentially incrementing the TTL in the NSH to trace the SFP.</di=
v></blockquote>But I think that this approach would not work. Please consid=
er what happens when a packet gets to the control plane. The NSH is removed=
. As a result, the ICMP packet with the IP destination address of the last =
SFF is revealed. I think that the node will forward the packet instead of s=
ending the ICMP echo reply back to the sender.<div><div>It was the motivati=
on for the work on SFC Echo Request/Reply, work that the SFC WG hs adopted.=
 The draft defines formats of SFC Echo Reply/Request and mechanisms necessa=
ry to perform ping and trace functions on an SFP. The draft has been stable=
 and authors would appreciate WG Chairs consideration for WFLC.</div><div><=
br></div><div>Regards,</div><div>Greg</div><div><br></div></div></div>

--000000000000aed19d05a33538e3--


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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Mon, 13 Apr 2020 17:41:47 -0700
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Subject: Re: [sfc] Ping and traceroute in SFP
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Dear All,
apologies, I've missed mentioning the draft that the authors would like to
be considered for the WGLC - draft-ietf-sfc-multi-layer-oam
<https://datatracker.ietf.org/doc/draft-ietf-sfc-multi-layer-oam/>.

Regards,
Greg

On Mon, Apr 13, 2020 at 5:24 PM Greg Mirsky <gregimirsky@gmail.com> wrote:

> Dear All,
> drat-ietf-sfc-oam-requirements suggests that ICMP "can be used for some of
> the connectivity functions [ of SFC]". Indeed, ICMP can be used to ping an
> SFF given its IP address is known to the sender. But I don't see that ICMP
> can be used to trace an SFP. The draft suggests the following procedure:
>
> the initiator could send OAM packets with sequentially incrementing the
> TTL in the NSH to trace the SFP.
>
> But I think that this approach would not work. Please consider what
> happens when a packet gets to the control plane. The NSH is removed. As a
> result, the ICMP packet with the IP destination address of the last SFF is
> revealed. I think that the node will forward the packet instead of sending
> the ICMP echo reply back to the sender.
> It was the motivation for the work on SFC Echo Request/Reply, work that
> the SFC WG hs adopted. The draft defines formats of SFC Echo Reply/Request
> and mechanisms necessary to perform ping and trace functions on an SFP. The
> draft has been stable and authors would appreciate WG Chairs consideration
> for WFLC.
>
> Regards,
> Greg
>
>

--000000000000adef5805a3357749
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Dear All,<div>apologies, I&#39;ve missed mentioning the dr=
aft that the authors would like to be considered for the WGLC -=C2=A0<a hre=
f=3D"https://datatracker.ietf.org/doc/draft-ietf-sfc-multi-layer-oam/">draf=
t-ietf-sfc-multi-layer-oam</a>.</div><div><br></div><div>Regards,</div><div=
>Greg</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"g=
mail_attr">On Mon, Apr 13, 2020 at 5:24 PM Greg Mirsky &lt;<a href=3D"mailt=
o:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt; wrote:<br></div><blo=
ckquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left=
:1px solid rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr">Dear All,<di=
v>drat-ietf-sfc-oam-requirements suggests that ICMP &quot;can be used for s=
ome of the connectivity functions [ of SFC]&quot;. Indeed, ICMP can be used=
 to ping an SFF given its IP address is known to the sender. But I don&#39;=
t see that ICMP can be used to trace an SFP. The draft suggests the followi=
ng procedure:</div><blockquote style=3D"margin:0px 0px 0px 40px;border:none=
;padding:0px"><div>the initiator could send OAM packets with sequentially i=
ncrementing the TTL in the NSH to trace the SFP.</div></blockquote>But I th=
ink that this approach would not work. Please consider what happens when a =
packet gets to the control plane. The NSH is removed. As a result, the ICMP=
 packet with the IP destination address of the last SFF is revealed. I thin=
k that the node will forward the packet instead of sending the ICMP echo re=
ply back to the sender.<div><div>It was the motivation for the work on SFC =
Echo Request/Reply, work that the SFC WG hs adopted. The draft defines form=
ats of SFC Echo Reply/Request and mechanisms necessary to perform ping and =
trace functions on an SFP. The draft has been stable and authors would appr=
eciate WG Chairs consideration for WFLC.</div><div><br></div><div>Regards,<=
/div><div>Greg</div><div><br></div></div></div>
</blockquote></div>

--000000000000adef5805a3357749--


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From: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
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Subject: Re: [sfc] Ping and traceroute in SFP
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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Mon, 13 Apr 2020 19:18:02 -0700
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To: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
Cc: Tal Mizrahi <tal.mizrahi.phd@gmail.com>,  Service Function Chaining IETF list <sfc@ietf.org>, "sfc-chairs@ietf.org" <sfc-chairs@ietf.org>
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Subject: Re: [sfc] Ping and traceroute in SFP
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Dear Carlos,
thank you for correcting the reference, I was sloppy. As for the quote,
I've found it in the section on ICMP and assumed that it is related to the
proposed procedure using ICMP in SFC OAM. Also, your suggestions are very
helpful and someone might start a new work based on an idea that you've
shared.

Regards,
Greg

On Mon, Apr 13, 2020 at 6:27 PM Carlos Pignataro (cpignata) <
cpignata@cisco.com> wrote:

> Hello, Greg,
>
> To be clear, you are referring to a drat-ietf-sfc-oam-requirements draft.
> To my knowledge a draft with that filename does not exist; however, I
> believe you may be intending to refer to draft-ietf-sfc-oam-framework.
> Assuming that is the case:
>
> There are many ways to intercept an exception packet and send it to the
> control plane. One example is setting the TTL in IP. Another is using RAO=
.
> Another is specific instructions on NSH TTL expiration. And many others.
> None of this is new.
>
> Unfortunately, you are adding things that do not exist in draft-ietf-sfc-=
oam-framework=E2=80=A6
> The text says:
>
> Alternately, the initiator could send OAM packets with
>    sequentially incrementing the TTL in the NSH to trace the SFP.
>
> It does not say anything about ICMP echo replies. Or destination addresse=
s
> for trace. Or=E2=80=A6
>
> I apologize for sounding like a broken record, but draft-ietf-sfc-oam-fra=
mework
> does not define solutions.
>
> Now, if that is the justification for
> creating draft-ietf-sfc-multi-layer-oam, I strongly recommend that there =
is
> absolutely no need to create a full blown new protocol in paper,
> without implementation, copying MPLS LSP Ping. I=E2=80=99d recommend maki=
ng
> existing protocols such as ICMP, BFD, S-BFD, etc., work, rather than over
> engineering in paper.
>
> Best,
>
> Carlos.
>
> 2020/04/13 =E5=8D=88=E5=BE=8C8:24=E3=80=81Greg Mirsky <gregimirsky@gmail.=
com>=E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:
>
> Dear All,
> drat-ietf-sfc-oam-requirements suggests that ICMP "can be used for some o=
f
> the connectivity functions [ of SFC]". Indeed, ICMP can be used to ping a=
n
> SFF given its IP address is known to the sender. But I don't see that ICM=
P
> can be used to trace an SFP. The draft suggests the following procedure:
>
> the initiator could send OAM packets with sequentially incrementing the
> TTL in the NSH to trace the SFP.
>
> But I think that this approach would not work. Please consider what
> happens when a packet gets to the control plane. The NSH is removed.. As =
a
> result, the ICMP packet with the IP destination address of the last SFF i=
s
> revealed. I think that the node will forward the packet instead of sendin=
g
> the ICMP echo reply back to the sender.
> It was the motivation for the work on SFC Echo Request/Reply, work that
> the SFC WG hs adopted. The draft defines formats of SFC Echo Reply/Reques=
t
> and mechanisms necessary to perform ping and trace functions on an SFP. T=
he
> draft has been stable and authors would appreciate WG Chairs consideratio=
n
> for WFLC.
>
> Regards,
> Greg
>
> _______________________________________________
> sfc mailing list
> sfc@ietf.org
> https://www.ietf.org/mailman/listinfo/sfc
>
>
>

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<div dir=3D"ltr">Dear Carlos,<div>thank you for correcting the reference, I=
 was sloppy. As for the quote, I&#39;ve found it in the section on ICMP and=
 assumed that it is related to the proposed procedure using ICMP in SFC OAM=
. Also, your suggestions are very helpful and someone might start a new wor=
k based on an idea that you&#39;ve shared.</div><div><br></div><div>Regards=
,</div><div>Greg</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr"=
 class=3D"gmail_attr">On Mon, Apr 13, 2020 at 6:27 PM Carlos Pignataro (cpi=
gnata) &lt;<a href=3D"mailto:cpignata@cisco.com">cpignata@cisco.com</a>&gt;=
 wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px =
0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">



<div style=3D"overflow-wrap: break-word;">
Hello, Greg,
<div><br>
</div>
<div>To be clear, you are referring to a drat-ietf-sfc-oam-requirements dra=
ft. To my knowledge a draft with that filename does not exist; however, I b=
elieve you may be intending to refer to=C2=A0draft-ietf-sfc-oam-framework. =
Assuming that is the case:</div>
<div><br>
</div>
<div>There are many ways to intercept an exception packet and send it to th=
e control plane. One example is setting the TTL in IP. Another is using RAO=
. Another is specific instructions on NSH TTL expiration. And many others. =
None of this is new.<br>
<div><br>
</div>
<div>Unfortunately, you are adding things that do not exist in=C2=A0<font c=
olor=3D"#000000"><span>draft-ietf-sfc-oam-framework=E2=80=A6 The text says:=
</span></font></div>
<div><font color=3D"#000000"><span><br>
</span></font></div>
<div>
<pre style=3D"box-sizing:border-box;overflow:auto;font-family:&quot;PT Mono=
&quot;,Monaco,monospace;font-size:14px;padding:10px;margin-top:0px;margin-b=
ottom:10.5px;line-height:1.214;color:rgb(0,0,0);word-break:break-all;backgr=
ound-color:rgb(255,253,245);border:1px solid rgb(204,204,204);border-radius=
:4px;font-variant-ligatures:normal">Alternately, the initiator could send O=
AM packets with
   sequentially incrementing the TTL in the NSH to trace the SFP.</pre>
</div>
<div>It does not say anything about ICMP echo replies. Or destination addre=
sses for trace. Or=E2=80=A6</div>
<div><br>
</div>
<div>I apologize for sounding like a broken record, but=C2=A0<span style=3D=
"color:rgb(0,0,0)">draft-ietf-sfc-oam-framework does not define solutions.<=
/span></div>
<div><font color=3D"#000000"><span><br>
</span></font></div>
<div><font color=3D"#000000">Now, if that is the justification for creating=
=C2=A0draft-ietf-sfc-multi-layer-oam, I strongly recommend that there is ab=
solutely no need to create a full blown new protocol in paper, without=C2=
=A0implementation, copying MPLS
 LSP Ping. I=E2=80=99d recommend making existing=C2=A0protocols such as ICM=
P, BFD, S-BFD, etc., work, rather than=C2=A0over engineering in paper.</fon=
t></div>
<div><font color=3D"#000000"><br>
</font></div>
<div><font color=3D"#000000">Best,</font></div>
<div><font color=3D"#000000"><br>
</font></div>
<div><font color=3D"#000000">Carlos.<br>
</font>
<div><br>
<blockquote type=3D"cite">
<div>2020/04/13 =E5=8D=88=E5=BE=8C8:24=E3=80=81Greg Mirsky &lt;<a href=3D"m=
ailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.com</a>&gt=
;=E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB:</div>
<br>
<div>
<div dir=3D"ltr">Dear All,
<div>drat-ietf-sfc-oam-requirements suggests that ICMP &quot;can be used fo=
r some of the connectivity functions [ of SFC]&quot;. Indeed, ICMP can be u=
sed to ping an SFF given its IP address is known to the sender. But I don&#=
39;t see that ICMP can be used to trace
 an SFP. The draft suggests the following procedure:</div>
<blockquote style=3D"margin:0px 0px 0px 40px;border:none;padding:0px">
<div>the initiator could send OAM packets with sequentially incrementing th=
e TTL in the NSH to trace the SFP.</div>
</blockquote>
But I think that this approach would not work. Please consider what happens=
 when a packet gets to the control plane. The NSH is removed.. As a result,=
 the ICMP packet with the IP destination address of the last SFF is reveale=
d. I think that the node will forward
 the packet instead of sending the ICMP echo reply back to the sender.
<div>
<div>It was the motivation for the work on SFC Echo Request/Reply, work tha=
t the SFC WG hs adopted. The draft defines formats of SFC Echo Reply/Reques=
t and mechanisms necessary to perform ping and trace functions on an SFP. T=
he draft has been stable
 and authors would appreciate WG Chairs consideration for WFLC.</div>
<div><br>
</div>
<div>Regards,</div>
<div>Greg</div>
<div><br>
</div>
</div>
</div>
_______________________________________________<br>
sfc mailing list<br>
<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/sfc" target=3D"_blank">htt=
ps://www.ietf.org/mailman/listinfo/sfc</a><br>
</div>
</blockquote>
</div>
<br>
</div>
</div>
</div>

</blockquote></div>

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From nobody Tue Apr 14 04:05:33 2020
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Subject: [sfc] I-D Action: draft-ietf-sfc-oam-framework-13.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Service Function Chaining WG of the IETF.

        Title           : Service Function Chaining (SFC) Operations, Administration and Maintenance (OAM) Framework
        Authors         : Sam K. Aldrin
                          Carlos Pignataro
                          Nagendra Kumar
                          Ram Krishnan
                          Anoop Ghanwani
	Filename        : draft-ietf-sfc-oam-framework-13.txt
	Pages           : 21
	Date            : 2020-04-14

Abstract:
   This document provides a reference framework for Operations,
   Administration and Maintenance (OAM) for Service Function Chaining
   (SFC).



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-sfc-oam-framework/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-sfc-oam-framework-13
https://datatracker.ietf.org/doc/html/draft-ietf-sfc-oam-framework-13

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-sfc-oam-framework-13


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/



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Reviewer: Tirumaleswar Reddy

Review result: Ready with issues





I reviewed this document as part of the security directorate's ongoing effo=
rt to review all IETF documents entering the IESG.  These comments are dire=
cted at the security area director(s).  Document editors and WG chairs shou=
ld treat

these comments like any other last call comments.



This document provides a reference framework for OAM for SFC.



Comments:



1. The document in Section 8 discusses various attacks (including both secu=
rity and privacy) but does not discuss any protection mechanisms other than=
 proposing rate-limiting.  It is suggesting drafts proposing the OAM soluti=
on should address the attacks but I don't see any security

mechanisms discussed in draft-ietf-sfc-ioam-nsh to address the attacks.



2. More discussion is required on the internal attacks.

(a) How are attack packets bypassing SFC detected and blocked ?

(b) How is sensitive information protected from eavesdroppers ?

(c) How is DoS/DDoS attack of misusing the OAM channel is mitigated ?

(d) Rate-limiting blocks both good and bad OAM probes and is a weak mitigat=
ion strategy. Anomaly detection (e.g., deep learning techinques) and identi=
fying the attacker look like a better strategy.



Cheers,
-Tiru

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<div class=3D"WordSection1">
<p class=3D"MsoPlainText">Reviewer: Tirumaleswar Reddy<o:p></o:p></p>
<p class=3D"MsoPlainText">Review result: <strong><span style=3D"font-family=
:&quot;Calibri&quot;,sans-serif">Ready with issues<o:p></o:p></span></stron=
g></p>
<p class=3D"MsoPlainText"><strong><span style=3D"font-family:&quot;Calibri&=
quot;,sans-serif"><o:p>&nbsp;</o:p></span></strong></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">I reviewed this document as part of the security =
directorate's ongoing effort to review all IETF documents entering the IESG=
.&nbsp; These comments are directed at the security area director(s).&nbsp;=
 Document editors and WG chairs should treat
<o:p></o:p></p>
<p class=3D"MsoPlainText">these comments like any other last call comments.=
<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">This document provides a reference framework for =
OAM for SFC.
<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">Comments:<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">1. The document in Section 8 discusses various at=
tacks (including both security and privacy) but does not discuss any protec=
tion mechanisms other than proposing rate-limiting. &nbsp;It is suggesting =
drafts proposing the OAM solution should
 address the attacks but I don&#8217;t see any security <o:p></o:p></p>
<p class=3D"MsoPlainText">mechanisms discussed in draft-ietf-sfc-ioam-nsh t=
o address the attacks.
<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">2. More discussion is required on the internal at=
tacks. <o:p>
</o:p></p>
<p class=3D"MsoPlainText">(a) How are attack packets bypassing SFC detected=
 and blocked ?
<o:p></o:p></p>
<p class=3D"MsoPlainText">(b) How is sensitive information protected from e=
avesdroppers ?<o:p></o:p></p>
<p class=3D"MsoPlainText">(c) How is DoS/DDoS attack of misusing the OAM ch=
annel is mitigated ?<o:p></o:p></p>
<p class=3D"MsoPlainText">(d) Rate-limiting blocks both good and bad OAM pr=
obes and is a weak mitigation strategy. Anomaly detection (e.g., deep learn=
ing techinques) and identifying the attacker look like a better strategy.
<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">Cheers,<o:p></o:p></p>
<p class=3D"MsoNormal">-Tiru<o:p></o:p></p>
</div>
</body>
</html>

--_000_CY4PR1601MB12541726BC79551C2A2EBBF0EAD40CY4PR1601MB1254_--


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From: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
CC: "secdir@ietf.org" <secdir@ietf.org>, "sfc@ietf.org" <sfc@ietf.org>, "draft-ietf-sfc-ioam-nsh.all@ietf.org" <draft-ietf-sfc-ioam-nsh.all@ietf.org>
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
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Subject: Re: [sfc] Secdir last call review of draft-ietf-sfc-oam-framework
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From: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
CC: "secdir@ietf.org" <secdir@ietf.org>, "sfc@ietf.org" <sfc@ietf.org>, "draft-ietf-sfc-ioam-nsh.all@ietf.org" <draft-ietf-sfc-ioam-nsh.all@ietf.org>
Thread-Topic: [sfc] Secdir last call review of draft-ietf-sfc-oam-framework
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Date: Sun, 26 Apr 2020 12:52:38 +0000
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